* Refactor document.js into a class
* Move public functions first
* Rename private functions
* Rename
* Rename argument
* Use instance of DocumentUtil
* Update tests
* Refactor
* Rename (test-)document.js to (test-)document-util.js
* Remove some unnecessary _setQuery calls
* Add support for forcing the query parser to be visible or hidden
* Move _setEventListenersActive calls
* Remove URL for kanji links
* Refactor _setContentTermsOrKanji
* Move search query text assignment into Display
* Move title updates into Display
* Move popup close calls
* Prevent infinite loop of extension unload events
* Create DisplayHistory
* Change arguments for _setContentTermsOrKanji
* Set up history-driven content updates
* Use new history only
* Load definitions if missing
* Refactor definitions getting
* Add support for wildcards
* Move definitions setup
* Add events
* Allow state change even if there is no history state
* Update search page to use history
* Fix history overwriting
* Fix search page not seeing state chang events during prepare
* Update state if necessary
* Don't reassign query text if the same
* Remove DisplayContext
* Initialize with real history state
* Track URL
* Update DisplayHistory to support pseudo-history
* Configure history settings on search page
* Fix state
* Use full URL
* Change data format of setContent
* Rename details to content
* Update event arguments
* Fix animation
* Remove old state changes
* Clear content properly
* Remove set/clear content overrides
* Fix setting up event listeners for content clear
* Make clearContent private
* Make focus opt-in
* Validate source
* Add unloaded type
* Generalize content params
* Update how extension unload content is assigned
* Restore query blurring
* Move "yomichan" object setup to a separate file
* Update script imports
* Align message handlers
* Rename Yomichan.prepare to Yomichan.ready
* Add new prepare function
* Improve isExtensionUrl
* Use new CrossFrameAPI for popup proxy communication
* Remove use of old cross-frame communication classes
* Remove use of old cross-frame communication files
* Make the crossFrame object a member of the api object
* Remove newlines for term-definition-item-template
* Update how action button icons are styled
* Fix spacing
* Group text colors together
* Correct image styles
* Fix missing </span>
* Update formatting
* Merge default tag color with category-less tags
* Use CSS variables for colors
* Add dark theme colors
* Move color variables into display.css
* Remove old stylesheets
* Update headings
* Bump minimum Firefox version to support CSS var()
* Revert popular kanji text color
* Convert mixed japanese.js to utility class
* Copy functions from bg/js/japanese.js into mixed/js/japanese.js
* Remove bg/js/japanese.js
* Make wanakana dependency optional
* Update tests
