Changes in this commit:
- Fix arrays to large (10 elements instead of 8) copied from the old keyboard system. Issue introduced in #5610
- Add ё popup.
- Change shift key as per #5659 (for both ro and ru keyboards)
- Translate Russian space and symbol keys.
- Rename Sym key to 123
* Switch the last few remaining icons to true glyphs
(Del/Backspace & Enter).
Also, allow a glyph to be rendered in (fake) bold, and use it for Enter.
* Update fonts
Pickup the tweaked nerdfonts for the backspace symbol
Follow-up to #5583.
* Add separate Cyrillic/Russian keyboard
* And remove that from English
* Update French keyboard (is easy)
* Remove yahzhert, that was just a double of QWERTY
* Update Spanish keyboard
* Reduce Japanese to 4 layers and add globe
* Reduce Korean to 4 layers
* Reduce Greek to 8 layers
