Convert AV Moderation and Breakout Rooms 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

Create IStateful interface
Use IState interface everywhere
Remove unnecessary @ts-ignore

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

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

Hide Pin to Stage button while screensharing
Fix pin indicator while screensharing

See multiple participants on stage
Pin and unpin to stage
Automatic selection of participants to be displayed on the stage filmstrip based on dominant speaker changes
Make Filmstrip a reusable component. Used by MainFilmstrip (old functionality) and the new StageFilmstrip
Rename DominantSpeakerName to StageParticipantNameLabel
Active border now showed only for the dominant speaker (no longer for the pinned participant)
Hide video from the vertical filmstrip for the participants on stage
Update video constraints
Updated pinned indicator

- option to hide the context menu
- option to hide private chat button

When the local participant is a moderator and is in a breakout room hide the following:
- advanced moderation
- Ask to Unmute
- Grant Moderator

Update video thumbnail design
Update design of indicators
In filmstrip view move Screen Sharing indicator to the top
Removed dominant speaker indicator
Use ContextMenu component for the connection stats popover
Combine Remove video menu and Meeting participant context menu into one component
Moved some styles from SCSS to JSS
Fix mobile avatars too big
Fix mobile horizontal scroll
Created button for Send to breakout room action