Revert color change of scroll corner

This reverts commit e56c7070c2.

Fix some errors. Remove @ts-ignores
Convert some files to TS
Remove some eslint-disables

Fix imports

Replace withStyles with makeStyles

Fix imports
Remove unnecessary @ts-ignore

* feat(a11y) buttons can now have toggled-aware a11y labels

feat(a11y): use tabs ARIA design pattern when using tabbed UI

feat(a11y): added headings across the app for easier screen reader nav

Co-authored-by: Maria Mironova <maria@example.com>

Move some styles from SCSS to JSS
Convert some files to TS
Implement redesign

* feat(chat/polls/native): update ui

* tss-react doesn't need a type anotation for the Theme

* Update tss-react to 4.4.4

Remove unused icons
Remove fill none from icons
Rename some icons

Remove global variables from files
Change type to interface

* feat(chat): fixed chat counter and updated new messages button web styles

Remove unnecessary ts-ignores
Remove unnecessary eslint-disable
Fix type errors
Change Dispatch type to IStore['dispatch']

Improve Dialog component to auto close on cancel or on submit
Change logic to determine whether a dialog is using the new component
Convert some files to TS

Use new TS config from @jitsi/eslint
Fix all lint errors

Remove unnecessary ts-ignores
Change any to actual types
Fix eslint rule

Convert files that use material-ui to TS (needed for material-ui upgrade)

Change scroll to bottom when receive a new message with:
- scroll to bottom if scroll was at the bottom before getting a new message
- keep the scroll in his original position when the scroll position was not at the bottom
- scroll to bottom when open first time the chat

* feat(chat/web) fixed for 2 byte char duplication on Chat

Fixes: on iOS web the chat input would move from the bottom when the keyboard was open

Show GIF menu in reactions menu
Search GIFs using the GIPHY API
Show GIFs as images in chat
Show GIFs on the thumbnail of the participant that sent it
Move GIF focus using up/ down arrows and send with Enter
Added analytics

* feat(lobby): lobby chat

lobby chat support
knocking participants list updates
knocking participants conditonal checks to show message button
handle lobby chat message events
lobby messages from or to moderators only

Co-authored-by: Fecri Kaan Ulubey <f.kaan93@gmail.com>

* squash: Drop typos.

Co-authored-by: Kusi Musah Hussein <kusimusah@gmail.com>
Co-authored-by: Fecri Kaan Ulubey <f.kaan93@gmail.com>
Co-authored-by: Дамян Минков <damencho@jitsi.org>

- add possibility to allow execution of the button's routine besides triggering
`toolbarButtonClicked` API event
- keep backwards compatibility
- get rid of `ToolbarButton`