feat(a11y): make (most) UI elements reachable via keyboard

Convert some files to TS
Implement redesign
Add Virtual background and Flip video to picker menu

Convert some files to TS
Remove unnecessary files
Implement redesign
Add noise suppression to picker menu
Fix Popover placement on browser resize

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

* Update tss-react to 4.4.4

Remove global variables from files
Change type to interface

Co-authored-by: Calinteodor <calin.chitu@8x8.com>
Co-authored-by: Robert Pintilii <robert.pin9@gmail.com>

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

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

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

refactor overflow menu to use ContextMenu component
refactor toolboxItem to use ContextMenuItem when needed

Fixes issue where the menu would disappear on dominant speaker change

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

Clicking on an item when the popup drawer is displayed would keep it open.
Now clicking on any item should automatically close the drawer.

Popup was also refactored and no longer uses refs.

Created Reusable components for:
- ListItem - used by participants list and lobby participants list
- ContextMenu - used by participant context menu and advanced moderation context menu
- Quick action button - used by quick action buttons on participant list items

Moved participants custom theme to base/components/themes

Created reusable button component for all participants pane buttons (Invite, Mute All, More)

Moved web components to web folder

Moved all styles from Styled Components to JSS

Fixed accessibility labels for some buttons

Removed unused code

Updated all styles to use theme tokens