OSK visual improvements
The new on-screen keyboard has some rough visuals in places and would benefit from some polish.
- The following keys need icons rather than characters:
- Keyboard layout
- Keyboard retract (could possibly use a down arrow?)
- Different visual treatment for latched-shift?
- Button labels look small in comparison to the size of the buttons
- Character variant popovers (shown on long-press):
- Popover beak doesn't point to the right place
- General styling improvements needed