* Proof-of-concept for showing card tags (#1626)
* Resolved most PR comments:
- Added a snackbar notification when clicking tag button
- Replaced magnifying glass icon with new tag icon
- Button now contains a span w/icon, to use text color
- Removed unnecessary attributes from button
- Backend now returns full noteInfos object
- Frontend now handles filtering tags
* Add options to show/hide tag button & filter tags
* Do not show tags button if, after filtering, we have zero tags.
* Change tags option to enums, optimize tags intersection check & fix code style.
* Update options-util.js to include new tag options.
* Fix wording on new tag setting.
* Add CSS to remove hidden buttons from the display layout.
* getAnkiNoteInfo extra parameter for additional info.
* Add new tag option to tests.
* Remove unnecessary changes related to anki tags option.
* Code style fixes.
* Add double-down-chevron.svg
* Add options
* Update dictionary importers
* Update settings
* Add support for collapsible definitions
* Improve case when there is a very small amount of overflow
* Fix incorrect enabled state of newly imported dictionaries
* Remove redundant language assignment
* Segment furigana from DisplayGenerator
* Remove furiganaSegments from translator data
* Add backwards compatibility for furiganaSegments
* Update tests
* Improve grouping for inflection and expression styles
* kanji-link => expression-kanji-link
* Remove unnecessary entry-header2 and entry-header3
* Move tag list into header for consistency with term definitions
* Move styles
* Add clear
* Add card icon to audio menu items
* Update cache data format
* Create _getCacheItem
* Add _playAudioFromSource function
* Implement default card audio info
* Specify exact audio to download when an override is assigned
* Abstract using _getMenuItemSourceInfo
* Update downloadability check
* Update the main audio menu buttons to also assign the default source
* Move background.html to /
* Move context.html to /
* Move info.html to /
* Move legal.html to /
* Move permissions.html to /
* Move pitch-accents-preview.html to /
* Move popup-preview.html to /
* Move search.html to /
* Move settings.html to /
* Move settings2.html to /
* Move template-renderer.html to /
* Move welcome.html to /
* Move float.html to /
* Move display-templates.html to /