Keyboard UX/UI: Access to caps lock - clearer icons

[ugtthis]

Was reminded again to do this once I saw the comment from discord

• Builds upon PR Keyboard: add missing control btns to uppercase #34344
• double tap threshold is 250ms which felt pretty good to me when I was using it. Not too fast and not too long
• improves abillity to type passwords for wifi
• improved shift/capslock icon

Comparison

Current Shift Key UI/UX	Proposed Shift Key UI/UX

Proposed UI/UX Enlarged

[github-actions]

UI Preview

keyboard : $${\color{red}\text{DIFFERENT}}$$

master	proposed
diff	composite diff

keyboard_uppercase : $${\color{red}\text{DIFFERENT}}$$

master	proposed
diff	composite diff

All Screenshots

[ugtthis]

Now it's a simpler implementation. I do like the double tap feature cause I think it is the better UX solution but it's not yet that important especially since there is a simpler solution that solves the main problem, which is to have access to caps lock

New UX - no double tap