* Add page exit prevention functionality to SettingsController
* Update dictionary controller to use new page exit prevention system
* Remove page-exit-prevention.js
* Add clone function
* Replace utilIsolate with clone
* Replace JsonSchema.isolate with clone function
* Include core.js for tests which use json-schema.js
* Update visisted set
* 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
* Add support for injecting stylesheets into a custom parent node
* Add api.getStylesheetContent
* Add support for injecting a CSS file's content
* Add usePopupShadowDom option
* Use a per-parentNode cache
* Add support for using a shadow DOM wrapper around popup iframes
* Ignore the popup container instead of the frame
* Create member functions for ignoreElements and ignorePoint
* Create addFullscreenChangeEventListener utility
* Move popup creation management into Frontend
* Move getUrl implementation
* Remove old setup
* Remove try/catch block
* Error wrap
* Add prepare call to TextScanner
* Update depth when popup changes
* Refactor how Frontend gets PopupFactory and frameId
* Update popup preview to work
* Update popup preview frame to use the frontend's popup
* Update how nested popups are set up
* Error wrap
* Update how popups are set up on the search page
* Error wrap
* Error unwrap
* Add missing prepare
* Remove use of frontendInitializationData
* Catch and log errors
* Update test
* Rename db to _db
* Create GenericDatabase class
* Catch prepare error
* Allow database to be purged even if it was not open
* Remove unused functions
* Change static functions to non-static
* Delete and count using the media object store
* Update tests
* Add link to the help button
* Update context.html to not use bootstrap
Styles moved into a separate file
Update icons
* Update terminology to correspond to new icons
* Convert handlebars.js to a class
* Move/rename function
* Update helper registration
* Rename helper functions
* Limit cache size
* Make render() async
* Rename and move
* Remove setDisabled member; replace with an event
* Pass frameOffsetForwarder directly to PopupProxy
* Replace .start with .prepare
* Make onMessage private
* Make message safer and handle unexpected inputs
* 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
* Update how optionsContext is assigned to targets
* Add getSettings and modifySettings
* Merge DOMSettingsBinder into GenericSettingController
* Remove old DOMSettingsBinder
* Update how fields are populated
* Update how fields are modified after a model change
* Update how _onFieldsChanged assigns fields
* Update how spinner is hidden
* Remove jQuery usage
* Use non-jQuery events
