Fixed broken styles.

Fixed issue with the browser not loading extension for Issues and Wiki pages.

A hotfix release to address few major bugs:

* Fixed image uploading. (#444)
* Fixed editing comments. (#453)

We are aware that there are still some cases where GitHub Writer will not load at random, but this release addresses structural issue that caused GHW to never appear for edited comments.

### New features

* Upgraded to [CKEditor 5 v35.3.1](https://github.com/ckeditor/ckeditor5/releases/tag/v35.3.1).
* Improved IME support.
* Lots of accessibility improvements, including:
* focus management,
* labels for assistive technologies,
* editor feature state hinting,
* keyboard handling.
* Improved performance.
* Brings improved toolbar button tooltip handling.
* To-do list no traps the <kbd>tab</kbd> key.

### Fixed issues

* Fixed a case where balloon toolbars would have rendering artifacts. (#377)
* Ensured that the selection goes to the editable area after heading button is used. (#380)
* Fixed a link in the extension's icon balloon. (#356)

### New features

- Upgraded to [CKEditor 5 v35.0.0](https://github.com/ckeditor/ckeditor5/releases/tag/v35.0.0).
- Added cell merge/split for tables. (#330)
- Added a possibility to set alternative text for an image. (#10)

### Fixed issues

- Fixed multiple cases where writer would not load up properly. (#337, #345)
- Editor no longer overflows to other GitHub UI when editing long Markdown files. (#266)
- Disabled inline images to facilitate more structured content. (#343)
- Fixed a bug where editable corners would have edge rendered incorrectly. (#311)
- Cosmetic improvements in Mermaid toolbar styling. (#307)

- Bumped CKEditor to v32.0.0 from 25.0.0.
- Introduced CKEditor 5 Mermaid plugin that adds support for creating diagrams.
- Minor styling improvements.

Fixed issues:
- Fixed the UI CSS to use the new CSS variables introduced by GitHub (#270)

New features
- Upgraded to CKEditor 5 v25.0.0.
- Introduced auto-formatting for todo lists. (#248)

Fixed issues
- An important pasting issue related to mentions has been fixed. (#243)

New features
- Upgraded to CKEditor 5 v24.0.0.
- Upgraded to Linguist v7.12.2.

Fixed issues
- Fixed the compatibility with GitHub's native Dark Theme. (#238)

New features:
- Upgraded to CKEditor 5 v22.0.0.
- Auto-formatting is now working when typing inside parenthesis or quotes. (#223)

Fixed issues:
- Fixed unwanted elements and style issues in some pages, like wiki page editing. (#209)

Other:
- Removed the ability of pressing TAB to change heading level. (#208)

New features:
- No extra permission requests are necessary anymore to install the Chrome extension 🎉 (#200)

Fixed issues:
- The editor will not anymore grow if long code lines are included. (#199)
- Auto-grow is back to work again in new comment editors. (#202)

New features:
- Upgraded to CKEditor 5 v20.0.0.
- Upgraded to Linguist v7.10.0.
- Reduced the required permissions to install the extension. (#173)

New features:
- Brand new icons, aligned to the ones recently introduced by GitHub.
- Upgraded to CKEditor v19.1.1. Among other benefits:
- It's now easier to insert paragraphs before or after objects (images, horizontal lines, tables) that are either at the beginning or at the end of the editor content. (#127)
- Tables are now created without headers by default as our previous decision to change this behaviour may not be have been optimal. (#196)

New features:
- GitHub Writer is not supported when editing repository markdown files directly on GitHub. (#192)
- It supports both editing and creation of new markdown files.
- All the fancy things of GitHub Writer, including image upload.
- Unfortunately, no support for Firefox at this stage :(
- Introduced GitHub Writer in the Milestone editing page. (#78)
- Following the trend, you'll find GitHub Writer also in your Saved Replies settings.
- Table headers will now be enabled by default on tables so the editor output is more markdown friendly. (#165)

This is an important release with many internals of the GitHub Writer API being reviewed. Most of the changes don't have an immediate impact on features, but they will definitely raise the quality of the code in general.

Fixed issues:
- Fixed an issue where the browser was navigating away when clicking on some types of links in the editor content. (#189)

New features:
- Introduced auto-resizing, to smartly use the available viewport size. (#20)
- Several internal and development optimizations.

Fixed issues:
- Fixed an issue with emojis following links. (#181)
- Fixed the reload of the page not being in the right mode in some situations. (#180)
- Fixed form locking when the user aborts switching from markdown to rte. (#185)

Fixed issues:
- Several enhancements to the submit button state handling. (#172)

Following several internal releases, this is the first public release of GitHub Writer 🎉

Have fun!

New features:
- Upgraded to CKEditor 5 v19.0.0.

Fixed issues:
- Fixed an issue with the selection next to some types of emojis in Chrome. (#160)
- Fixed the output of inline code when styled with other inline styles, like bold. (#157)