- Show more/less works correctly with auto-collapsed subjects and long posts
- RTL characters won't look messed up in notifications
### Changed
- Emoji autocomplete will match any part of the word and not just start, for example :drool will now helpfully suggest :blobcatdrool: and :blobcatdroolreach:
- Tons of color slots including ones for hover/pressed/toggled buttons
- Experimental `--variable[,mod]` syntax support for color slots in themes. the `mod` makes color brighter/darker depending on background color (makes darker color brighter/darker depending on background color)
- theme engine update to 3 (themes v2.1 introduction)
- massive internal changes in theme engine - slowly away from "generate things separately with spaghetti code" towards "feed all data into single 'generateTheme' function and declare slot inheritance and all in a separate file"
- Breezy theme updates to make it closer to actual Breeze in some aspects
- when using `--variable` in shadows it no longer uses the actual CSS3 variable, instead it generates color from other slots
- theme doesn't get saved to local storage when opening FE anonymously
- changed the way fading effects for user profile/long statuses works, now uses css-mask instead of gradient background hacks which weren't exactly compatible with semi-transparent themes