Amending Base10 to slightly darker `#202122` to fulfill WCAG
requirements in connection to Accent50.
Also adding it as WikimediaUI Base equivalent variable for
future replacement.
Also removing variables not in use any more.
Bug: T248393
Change-Id: I6fb5c288cfeb2bd3c786c2f5ab771074203b8fc0
Results in small UI changes, but allows us to delete a lot
of code duplication.
Depends-On: I9049f5a1c0d88680fc4a174e390dd08e27c0eee2
Change-Id: Iebe7bdc8a026b929a35e823d8107d90e7bb62b82
Updating user avatar icon to overhauled standard WikimediaUI icon.
Also:
- Using new icon default size instead of `80 x 80 px`. Icon is
resized by `background-size` in both applications anyways.
- Renaming 'user*' to 'user-avatar' for consistency across projects.
Bug: T123810
Change-Id: Ifb2027694af8f619663f00f4c50891772ee64746
