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

Remove Abstract class
Convert web component to function component

Remove Abstract component
Convert web component to function component

Move visible logic inside each button
Move click functionality inside each button
Extract getButtons function from Toolbox components to functions file

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

Upgrade eslint related packages
Fix new errors

Upgrade typescript related packages
Fix new errors and warnings

Revert color change of scroll corner

This reverts commit e56c7070c2.

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

Fix imports

Replace withStyles with makeStyles

Fix imports
Remove unnecessary @ts-ignore

* feat(a11y) buttons can now have toggled-aware a11y labels

feat(a11y): use tabs ARIA design pattern when using tabbed UI

feat(a11y): added headings across the app for easier screen reader nav

Co-authored-by: Maria Mironova <maria@example.com>

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

* feat(chat/polls/native): update ui

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

* Update tss-react to 4.4.4

Remove unused icons
Remove fill none from icons
Rename some icons

Remove global variables from files
Change type to interface

* feat(chat): fixed chat counter and updated new messages button web styles

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

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

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)

Change scroll to bottom when receive a new message with:
- scroll to bottom if scroll was at the bottom before getting a new message
- keep the scroll in his original position when the scroll position was not at the bottom
- scroll to bottom when open first time the chat