* Simplify svg and container styles
* Rename pitch-accent-details to pitch-accent-graph-container
* Rename pitch-accent-graph* to pronunciation-graph*
* Remove unused template
* Omit quotes
* Rename pitch-accent-character to pronunciation-mora
* Simplify names
* Replace pronunciation-mora-inner with pronunciation-character
* Improve grouping of nasal characters
* Simplify character replacement
* Replace pseudo-elements with real elements
* Use an element rather than a fragment
* Rename functions
* Add wrapper
* Rename pitch-accent-characters to pronunciation-text-container
* Update test data
* Update downstep notation generation
* Rename pitch-accent-position to pronunciation-downstep-notation-container
* Space
* Wrap pronunciations in a container node
* Update preview
* Embed pitch accent styles directly
* Add url/voice options to audio sources
* Add help for TTS
* Remove old settings
* Update tests
* Update use of audio source URL
* Improve labels for sources with the same type
* Update environment info to return the 'safari' browser
* Fix popup display on Safari
* Update environment assignment
* Add data-loading-stalled property when loading takes longer than expected
* Add notification when loading has stalled
* Allow getDictionaryInfo invocation on non-privileged contexts
* Update _validatePrivilegedMessageSender
* Don't listen to 'voiceschanged' event unless addEventListener is present
Also expose an event
* 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
* Update PopupMenu event prevention
* Use vars for button padding
* Add button-inner-label style
* Add input-button button
* Update display of scope selection
* Add hidden argument text input field
* Remove unnecessary calls
* Display a strike through the enabled button when no scopes are selected