Some other systems are still broken.

- Fixed flicker when refreshing the entry view
- Added TAB navigation support
- Added graphical password interface
- Added pulsing animation to signal timeout
- Added 'set default' indicator
- Integrate opacity into the drawing pipeline
- Share button handling logics
- Fixed not aborting timeout on pointer click
- Fixed OpenCanopy intro animation not scaling with UIScale

BootPickers: Apple Event kb handling + typing; Apple Key Map non-repeat key handling; CTRL indicator in Builtin.

closes acidanthera/bugtracker#1554

Also fixed enabling `DisableSingleUser` when related quirks are off.

Incrementally update builtin picker text menu after first draw.
closes #228

'opencore-version' written as non-volatile variable can cause a broken variable when toggling WriteFlash.