* Update _updateSearchQuery to return the promise
* Update how the clipboard search popup is opened
* Create an API function to open the search popup
* Skip animation on popup creation
* Add API function
* Use a stringified JSON details object for extension port names
* Fix incorrect frame ID check
* Add support for connecting to different tabs
* Add function for invoking on a different tab
* Remove unused function
* Rename field
* Change extensionUnloaded trigger function
* Update how extension unloaded content is shown
* Ignore certain errors caused by extension unload
* Add _showExtensionUnloaded function
* Wrap internals of updateOptions
* Suppress errors caued by extension unload
* Make the frontend trigger the popup's extensionUnloaded event
* Refactor searchQueryUpdate action
* Use standard message handler style
* Use name "promiseOrResult" for consistency
* Use standard message handler convention for Yomichan message handlers
* Use common message handler invoker
* Add support for dynamic message handlers
* Pass messages using crossFrame.invoke instead of contentWindow.postMessage
* Set up async handlers
* Simplify configure call and response
* Remove bindings
* Fast exit if same window
* Simplify selector
* Rename functions, reuse _getFrameOffsetParent
* Update message style
* Send reply message to a specific frame
* Create FrameClient and FrameEndpoint
* Use new Frame* classes for Popup=>frame connection
* Update api.sendMessageToFrame and api.broadcastTab to include the sender's frameId
* Update FrameClient to store the frame's frameId
* Change getOrCreatePopup arguments to be an object
* Add ownerFrameId to popup and DisplayFloat
* Refactor DisplayFloat host action invocation
* Use CrossFrameAPI instead of window.postMessage
* Update popup closing functionality on the search page
* Organize by public/private
* Don't access super class's private members
* Make _autoPlayAudioTimer private
* Refactor constructors
* Make functions private
* Organize by public/private
* Organize window message handlers
* Make fields private
* Refactor DisplaySearch constructor
* Make functions private
* Organize by public/private
* Remove statics
* Move orphan detection and error handling to Display
* Add clearContent function
* Add/use public get/set functions for optionsContext
* Add public getOptions
* Move interactive assignment
* Mark fields as private
* Mark functions as private
* Change stray getter into a function
* 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
