* Refactor list of emoji requiring added outlines so that it can be theme-specific
* Split inaccessible emoji to emoji requiring an outline and ones that can be inverted
* Drop the “silouhettes” from black emoji as they seem to have changed color
* Add inaccessible emojis list for the light theme
* Use bordered emoji variant instead of unreliable CSS
* Play animated custom emoji on hover in status
* Play animated custom emoji on hover in display names
* Play animated custom emoji on hover in bios/bio fields
* Add support for animation on hover on public pages emojis too
* Fix tests
* Code style cleanup
Mastodon converts all Emoji to images, whether they have a VS15 after
them or not, but leaves the VS15 in the string, which is displayed as
a black box in Safari.
