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

Move styles from SCSS to JSS
Convert class to function component

Update Dial Out Dialog design
Update Country Picker design
Convert some files to TS
Move styles from SCSS to JSS
Replace atlaskit InlineDialog with Popover in CountryPIcker and Prejoin components

Fix imports
Remove unnecessary @ts-ignore

 - use new `Button` component for drop down buttons

Remove unused icons
Remove fill none from icons
Rename some icons

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

Autoofocus Strikes Back...

Fix the focus issue by disabling autofocus in case an auth (login, ait
for owner or password) dialog is shown.

Fixes: https://github.com/jitsi/docker-jitsi-meet/issues/1336

This reverts commit af7c316827.

- apply theming to various buttons

* feat(prejoin) move invite to toolbar section

* feat(premeeting) redesign prejoin and lobby screens

* code review changes

* fix prejoin flicker and avatar id

* fix password error message and native lobby dialog close position

* 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>

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

A user should not be forced to enter a display name if the lobby is not enabled
for the room.

* The prejoin page always displays the 'join without audio' option.
* The join button will be disabled if there is no input.
* Fix some CSS for the case when the user is not anonymous.

* Add a checkbox for skipping the prejoin page on next use. (This is hidden for
now, until we also have a settings entry for it).
* Rework 'Join by Phone' buttons and add new overlay.
* Update the device status accordingly if there were errors while adding
devices.
* The input is filled with the display name if there was one previously used.
* Join the meeting on 'Enter' press.