Adapt to different device widths (#401)

* Now adapting to small screen sizes, needs improvements

* Fix that site only gets into mobile mode when resized

* - Added navigation event triggered if user requests to return to navigation on compact screens
- People drawer wont be shown on compact screens
  - Still accessible using settings
  - would be duplicated UI
- mobileSize is now compactSize

* Put threshold for collapsing the base UI in a shared file

* Switch to a more simple solution using CSS media queries over JS
- Move back button to the left a bit so it doesnt get in touch with room icon

* switch from component-individual-thresholds to device-type thresholds
- <750px: Mobile
- <900px: Tablet
- >900px: Desktop

* Make Settings drawer component collapse on mobile

* Fix EmojiBoard not showing up and messing up UI when screen is smaller than 360px

* Improve code quality; allow passing classNames to IconButton
- remove unnessesary div wrappers
- use dir.side where appropriate
- rename threshold and its mixins to more descriptive names
- Rename "OPEN_NAVIGATION" to "NAVIGATION_OPENED"

* - follow BEM methology
- remove ROOM_SELECTED listener
- rename NAVIGATION_OPENED to OPEN_NAVIGATION where appropriate
- this does NOT changes that ref should be used for changing visability

* Use ref to change visability to avoid re-rendering

* Use ref to change visability to avoid re-rendering

* Fix that room component is not hidden by default.
This resulted in a broken view when application is viewed in mobile size without having selected a room since loading.

* fix: leaving a room should bring one back to navigation

Co-authored-by: Ajay Bura <32841439+ajbura@users.noreply.github.com>

src/app/organisms/room/RoomViewCmdBar.jsx

@@ -14,6 +14,7 @@ import {
   openCreateRoom,
   openPublicRooms,
   openInviteUser,
+  openNavigation,
 } from '../../../client/action/navigation';
 import { getEmojiForCompletion } from '../emoji-board/custom-emoji';
 import AsyncSearch from '../../../util/AsyncSearch';
@@ -44,7 +45,10 @@ const commands = [{
 }, {
   name: 'leave',
   description: 'Leave current room',
-  exe: (roomId) => roomActions.leave(roomId),
+  exe: (roomId) => {
+    roomActions.leave(roomId);
+    openNavigation();
+  },
 }, {
   name: 'invite',
   isOptions: true,