Fixed suggested key being a common key for cycling.

Fixed Firefox regex negative lookbehind error.

- Full rework of the popup UI to include the logo at the top instead of text, tabs for smaller popup window, changes to the switch for toggling features, and more!
- Added option to turn off CTRL conversion

- Fix Firefox formatting for the convert subtitle.
- Remove version_name from manifest.json since Firefox does not support it.
- Context Menu support (disabled by default) for conversion of selections.
- Clicking on context menu option copies the conversion to your clipboard.
- Fixed human readable not inserting the offset if using custom offset without set timezone.
- Added current timestamp in MS as well as current human readable date and time.
- Added ability to pause the current timestamps when hovering.
- Added ability to copy the current timestamps by clicking on them.
- Added notification-type overlay that lets you know an action occurred.
- Modified popup so that format and timezone settings are on the same line.
- Added copy button to the conversion when holding CTRL.
- Add command shortcut for cycling through the fetch formats (CTRL + SHIFT + RIGHT by default)

Added icons
Added images
Using offset instead of timezone abbreviation for human readable conversion auto-fill
Fixed choosing a timezone not setting properly.
Fixed custom offset displaying in the popup menu
Fixed selecting numbers with decimals fetching in the incorrect format
Fixed selecting numbers with spaces not working correctly.

Added a popup menu for the extension.
Added settings to allow formatting with specific timezone and format.
Added settings to allow what the Unix Epoch time is formatting from (seconds, milliseconds, microseconds, nanoseconds)
Added current Unix Epoch time in the popup.
Added ways to convert specific Unix Epoch timestamps within the popup.
Added ways to convert human-readable times into a Unix Epoch timestamp within the popup.
Fixed conversion not working in iframes.