Accessibility: keyboard navigation on the toolbar (Context menu)

* Convert all vh units to dvh; fixing layout for mobile browsers such as Chrome for Android.

feat(a11y): Globally improve accessibility for screen reader users

Remove unnecessary @ts-ignores
Use @ts-expect-error instead of @ts-ignore for external dependencies

Move styles from SCSS to JSS
Convert components from class to function

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

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

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

* Reencode mp3 sounds at lower bitrate, mono.
* Encode wav sounds as mp3.
* Remove unused sound file.
* Add opus encoded sounds.
* Add a script to encode sounds.

Remove unused icons
Remove fill none from icons
Rename some icons

* Make Jitsi WCAG 2.1 compliant

* Fixed password form keypress handling

* Added keypress handler to name form

* Removed unneccessary dom query

* Fixed mouse hove style

* Removed obsolete css rules

* accessibilty background feature

* Merge remote-tracking branch 'upstream/master' into nic/fix/merge-conflicts

* fix error

* add german translation

* Fixed merge issue

* Add id prop back to device selection

* Fixed lockfile

Co-authored-by: AHMAD KADRI <52747422+ahmadkadri@users.noreply.github.com>

Also fixes an issue where starting Chrome 90 air pods
no longer have the "Default -" prefix and the default
entry looks like a buggy duplicated one.

Found via `codespell -q 3 -S ./lang`

It appears that at the time of this writing, creating audio tracks blocks
the browser's main thread for a long time on safari. Wasn't able to confirm
which part of track creation does the blocking exactly, but not creating
the tracks seems to help and makes the UI much more responsive.

Some CSS fixes are also included.

This reverts commit faf24ca7ec.

This reverts commit 08f55ccb94.