Removes additional padding for the selector background. Effectively limits the boot entry label width to the expected value.

Simplifies calculations a little.

- 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.

Key events cannot abstractly be propagated, hence there is no point to the abstraction.

Fixes https://github.com/acidanthera/bugtracker/issues/1564

Non-overflowing picker may be left-aligned instead of centered.