* 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.
* Update dictionary settings structure to use an array instead of an object
* Update ensureDictionarySettings implementation
* Remove some usage of ObjectPropertyAccessor
* 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
* Add part of speech info to headwords
* Expose parts of speech to Anki template rendering
* Expose parts of speech
* Update pitch accent categories
* Update docs
* Add part-of-speech
* Update options and tests
* Update markers
* Update test data
* Update test data
* Move translator.js
* Create new version of Translator
* Update Backend
* Update DictionaryDataUtil
* Update DisplayGenerator
* Create AnkiNoteDataCreator
* Replace AnkiNoteData with AnkiNoteDataCreator
* Update tests
* Remove AnkiNoteData
* Update test data
* Remove translator-old.js
* Add TypeScript interface definitions for the new translator data format
* Expose modifier keys
* Add updateMenuItems
* Don't close menu if shift key is held
* Add _createMenuItems
* Simplification
* Maintain a list of open popup menus
* Expose expression/reading
* Reuse existing items
* Update menu after a cache update
* Update menu position
* Remove redundant language assignment
* Segment furigana from DisplayGenerator
* Remove furiganaSegments from translator data
* Add backwards compatibility for furiganaSegments
* Update tests
* Make invokeContentOrigin public
* Move display resizer functionality into a new class: DisplayResizer
* Simplify field names
* Use parent frame instead of content origin
* Remove unused
* Merge ungrouped characters
* Update iteration
* Fix incorrect code point handling
* Simplify text
* Specify language
* Update how parsed status is represented
* Add api.textHasJapaneseCharacters
* Add support for empty query
* Add support for showing the query parser for TextSourceElement
with content that does not start with Japanese text
* 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 valid field
* Add isNoteDataValid function
* Update _areDefinitionsAddableForcedValue to return proper valid values
* Refactor isAnkiConnected check
* Force canAdd to false if not valid
