Make redesign demoable #7596
Description
Do low-hanging fruit to make the whole thing more presentable:
- timeline margins
- color display names based on userId hash
- new style for date separator
- basic top left menu so settings and logout are accesible again
- room header margins and icons
- memberlist panel basic makeover
- member detail basic makeover
- rightpanel tab icons
- composer icons and style
- tweak room list font sizes