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

Fixes wrong focus on desktop picker dialog

* 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
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

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

 - use new `Button` component for drop down buttons

Use JitsiPortal on mobile

Remove focus outline for the close icon
Increase max height

Since we unmount the dialog after a timeout because of an animation we
need to cancel the timeout in case we need to render new dialog.
Otherwise the actual hiding can be executed after we render the new
dialog.

Needed for shared video dialog.

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

* Update tss-react to 4.4.4

Don't focus on the close button if there's another focusable element

Remove unused icons
Remove fill none from icons
Rename some icons

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>

If onSubmit opens a new dialog, we'd be hiding it otherwise.

Use theme background on autofill Firefox

Improve accessibility by not allowing the user to navigate outside the dialog

Convert some files to TS
Improve Dialog component

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

Convert some files to TS

Convert some files to TS

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

Remove @atlaskit/dropdown
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)

Bring Switch component more in line
Convert some files to TS