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

* ref(settings-dialog) Update to use new Dialog component

Created new DialogWithTabs component
Refactored Dialog into Dialog and BaseDialog
Updated dialog functionality on mobile

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

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)

Needed to revive the lobby tests.

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

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

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