v0.27.7: several fixes for features broken by TETR.IO updates

Changelog:
- Fixed custom sound effects, custom music, music graph hooks for TETR.IO β1.6.2
- Fixed several issues related to internal storage and tpse migrations: the hidden value of custom songs will no longer reset by itself, and will be properly set when importing older TPSEs
- Experimental, optional extended watermark showing enabled features in-game in the corner at all times - this may or may not stick around as a feature, and the toggle is currently listed only in debug mode

0.27.4: Interim release containing a number of fixes that have been on nightly releases for a bit

Fixes:
- Fixed animated skins (`advanced skin loader`) and `force nearest neighbor scaling` for TETR.IO b1.1.1
- Fixed key OSD for TETR.IO b1.1.0
- Fixed music graph background containers interfering with mouse events in some game menus
- [FF 0.27.3] Fixed custom music for TETR.IO b1.0.0
- [FF 0.27.0] Fixed `disableVanillaMusic` not working when no substitute song was available

Changes and additions:
- Music graph: implemented event recording and replay, UI now opportunistically fetches possible events instead of using a hardcoded list and has an improved sort order
- Import: fixed parsing of some filekeys by prioritizing longer ones
- Added QP2 (zenith tower) board textures in other skins
- [FF 0.27.3] Add 'hidden' field support, improved `Upload music` UX
- [FF 0.27.0] Add touchkey editor fullscreen button, show overlapping keys option, templates

- Custom room replay auto-saver feature, which automatically saves replays with a descriptive title to `~/Downloads/tetrio-plus-replays`. This introduces a new optional permission on Firefox. A permission prompt will appear the first time you attempt to enable this feature.
- Added `hun.fnt` to other skins
- Fix touch controls broken due to base game updates
- Fix custom music broken due to base game updates
- Fix music graph global sfx hooks broken due to base game updates
- Music graph: fixed board fx appearing multiple times

Music graph changes and fixes:
- board height events are now only fired when the board height actually changes
- new 'board-new' and 'board-gone' events
- bring back node list in F8 menu
- misc. optimizations and bugfixes

- Fix key OSD, and now supports multiple players in replays. Note that the OSD won't appear until you start a game now.
- Music graph:
- Editor zooming
- Variable name interpolation
- Unique-per-board `$board` special variable available on most events
- Fixed `sfx-*` hooks
- Add non-player/enemy-specific sfx and fx event
- Add global `sfx-*-global` variants, which fire for _all_ sound effects played, including in the menu. However, these lack the `$board` context.

- Added 'quick fixes' menu, with tools for updating some content between TETR.IO versions and a built-in one-click fix for music editor corruption.
- Prompt to open main menu as tab when running on Firefox mobile
- Update map editor for TETR.IO's new comma-seperated bag format
- Touch controls: Added `Enter` touchkey binding
- Music graph improvements: control animated skin playback, global variables, `video-background-seeked` event, `$bg_playback_rate` variable, above-board foreground layers, other small fixes.

- Made the winter 2022 queue into its own asset, separate from the regular queue.
- Make custom skins work while the winter event is enabled, for real this time.
- Fix issues with backgrounds only working while the event is enabled.
- Music graph backgrounds: initialize $bg_opacity to 1 instead of 0.

- Make custom skins work while the winter event is enabled.
- :warning: the queue skin format has temporarily changed. Using the normal format while the winter event is enabled _will break your game_. Please remove your queue skin, use a new format skin, or disable the winter event in TETR.IO's config.
- Music graph: expression parsing with parenthesis fixed.
- Music graph: node variables now exposed through the API.
- The universal importer now has a dialog in data management. This provides the same functionality as drag-and-drop importing.
- Experimental: A build of the tpsecore is now included. You can test it out by going to `Data management` -> `Import anything`, and enabling the `Use tpsecore importer` checkbox.
- Fixed emote tab
- Experimental: Added `tpsez` format, which stores keys in a zip-based format instead of a json-based one. This can handle larger content packs.
- Sound effects editor:
- re-added option to load current sound effects (decompilation)
- option to export currently loaded sound effects (use the `load current` option first!) as a zip file of individual sounds.
- This can be used to export your current (after using `load current`) sound effects, or TETR.IO's base sound effects (immediately after loading the editor)
- configurable regex for extracting sound effect name when using `import multiple by filename`
- Other skins: new dedicated section in the main tetrio plus menu.
- Other skins: added `hun.png`.

- Fixed animated skins
- Winter event compatibility patch will no longer take effect unless a board texture of at least 1024x1024 is set.

TETR.IO PLUS v0.23.10
- Fix emote picker for TETR.IO v6.3.0
- Custom music metadata character set has been widened, allowing use of Japanese characters. (Contributors: @ywssp)
- Add board skins winter event compatibility patch option, accessible through edit other skins -> board. This allows using the temporary extended board format, supporting features like high resolution backgrounds. (Note that this is very sensitive to texture sizes, and while enabled using the default texture will break the game due to it being too small. Do not enable this option without setting a texture that is at least 1024x1024.)
- Rank icons can now be customized (Contributors: @Derpy#6137)

Key OSD: Fixed for replays
Other skins: Add particle_flake
Misc: All pop-up windows now have unique titles (useful for e.g. OBS)
Music graph: Added a debugger which shows active nodes represented as blue dots. Hovering over the dot shows the node's variables and has a button to kill it. Also adds spawn buttons to allow spawning nodes on click. Triggers will flash orange (or red if the predicate fails) when fired.
Music graph: New events: repeating-time-passed, hud-*-open, hud-*-close
Music graph: New special variables: $volume (0-1) $age (read only, age of node in seconds. Reset on goto) $time (read only, total time elapsed since music graph initialization in seconds, high accuracy)
Music graph: New WIP special vars: $bg_x $bg_y $bg_width $bg_height (percentages) $bg_opacity (0-1) $bg_paused (0-1) $bg_time (seconds) for controlling backgrounds.
Music graph: 'Single instance' option, preventing a node from being active more than once. Extra nodes going or forking to it will be destroyed.
Music graph: time-passed has slightly more accurate timing. Prefer using the new $time variable for precise calculations though.
Music graph: Undo/redo hotkeys ignored while a text/number input is focused.
Music graph: Fix pasting of nodes

Feature: Board and particle customization
Music graph: Added menu-*-open and menu-*-close events
Music graph: Proper video preloading, fixes black flashes. Note that as a result of this, the way music graph backgrounds are displayed was changed a bit. You can have only one of each given background active, and if multiple nodes attempt to use it at the same time the one with the highest layer wins. This shouldn't affect most usage unless you're relying on copies of the same background image to combine transparency or something.
Fix: Fixed opaque transparent background

tl;dr: The music graph is now turing complete. Also better editing and backgrounds.

Feature: forceNearestScaling option, disables TETR.IO's texture smoothing, makes pixel-y skins look sharper.
Custom backgrounds: Support for mp4 and webm video backgrounds when used through the music graph.
Music graph: Added variables. They can be set using the new set mode and accessed through new expression fields.
Music graph: Added 'create' trigger mode
Music graph: Custom events can now have a value set via expressions.
Music graph: Trigger relational guards (> < == !=) have been replaced with expression-based predicates which support variables.
Music graph: Real copy/paste now copies nodes to clipboard. This is separate from the individual node copy/paste buttons, use ctrl-c and ctrl-v.
Music graph: Multi-select nodes: Shift+drag to area select, ctrl-click to multi-select.
Music graph: Added background layer option
Music graph: Fix background preloading
Misc: run migrate on empty storage after clearing data (correctly restores default remote content pack url whitelist)
Misc: Fix drag-and-drop import for main tetrio plus window
Misc: Fix some import errors related to the music graph

New features:
- New skin format: Jstris connected
- Better warnings when auto-importing sfx

Bugfixes:
- Map editor: Fix setting hold piece with empty bag
- Fix tetrio level self-xss

Fixes for TETR.IO 6.1.0, which changed quite a bit of internal rendering code and broke several TETR.IO PLUS features.

New features:
- Import any file automatically by drag-and-dropping a file on to the data management window

Bugfixes:
- Fix advanced skin loader/animated skins.
- New skin formats to match TETR.IO's new skin format (see wiki for details)
- Music graph: Fixed board-height events
- Music graph: Replaced text-* with fx-* music graph events
- Map editor: Added width and height controls

New features:
- Dynamically set and stack backgrounds from the music graph
- Music graph API (early draft stage, see wiki)
- Toggle to swap between old and new OSD icons
- 'Listen to loop' button in the music editor and a new 'loop end' field that automatically changes the 'loop length' field

- Custom music: Overrides now set metadata including loop points
- Music graph: Fix random-target triggers
- Added status icons to page action (normal, off, remote content pack blocked, using remote content pack)
- The 'TETR.IO PLUS Enabled' option, when not enabled, now hides most of the customization options

- Add option to toggle *all* features off ("TETR.IO PLUS enabled"). This isn't quite as good as uninstalling, but is much easier to access.
- Added 'audio start' and 'audio end' options to music graph nodes
- Improved music graph timing - Still not certain on this and would appreciate feedback.
- New key OSD icons by Deer

- Fix URL patterns after TETR.IO added cachebuster params to all resources
- Yes, this update can be summarized as "added 12 asterisks"

https://you.have.fail/ed/hmm-today-I-will-break-tetrio-plus.png

- Fix advanced skin loader (again, different issue)
- Add a tool to decompile and download the current custom sound effect file
- Minor wording changes

A couple of bugfixes for breakages caused by TETR.IO's 6.0.0 update

- Fix advanced skin loader
- (desktop client) Fix skins not loading on low or minimal graphics

Bugfixes:
- Fix build step excluding some files it shouldn't have and breaking literally every asset importer

Bugfixes:
- Fix music graph (broken by tetr.io update 5.2.0)
- Fix game failing to load with advanced skin loading enabled but no skin set

Other:
- Some internal refactoring for a new standalone TPSE importer (see gitlab for details)

Bugfixes:
- Fix 'remove skin' button
- Fix emote popup breaking chat scrolling
- Fix advanced skin loader breaking when using single frame, non-372x30 skins
- Fix scaling issue when using the advanced skin loader

Internal changes to comply with mozilla addon policies