* Admin UI: implement HTML embeds
* Admin UI External Actions: set correct useHTML on edits
* Admin UI: edit by index, not URL
* External Actions: render HTML on stream frontend
* Don't open embeds externally
* Remove TODO comment
* Add HTML as unique action key
* Admin UI: Actions: use CodeMirror editor, dropdown
* Add className prop to some components
* Give mobile chatbox height priority over other elements
* Optimize for mobile landscape mode
* Make thumbnail background black
* Fix overflow issues on narrow screens
* Adjust layout for offline mode on mobile
* Fix main content width on Desktop
* Fix offline layout for desktop
* Hide/show on notify and fediverse feature disable/enable
* Update browser tests to enable features for testing
* Hide/show features in mobile action menu
* Do not show fediauth option if fediverse features are not enabled.
* Force showing tabs when in Storybook
* hide footer on mobile to avoid double scrollbars
* fix double scrollbars on desktop by removing scroll behaviour from main section
* add scrollbar styles to body and html
* add vertical scrolling back to main section
* prevent header from collapsing and messing around with scrolling
* prevent body from scrolling for main layout
* move tablet breakpoint into breakpoint mixin
* preffify code
* remove js height calc for lower section on mobile and use css
* enable scrolling within a tab on mobile
* remove scrollbar from main section on mobile
* adjust header height on mobile
* add react use to web
* lock body scroll for main layout