[UX] Allow keyboard layout selection

[Frenzie]

Fixes #3998.

This isn't quite what I want but I've been letting this slip for
too long due to fancier keyboard interaction concepts.

[poire-z]

The order of the items is random (not the same in the file vs your screenshot) ?
Any chance to get them in some order (with may be en/default at first place)?
Would it make sense to give the menu item better names than these few letters? Or is that the classic naming for keyboards?
(Alternative, the 6 first letters of the keyboard, qwerty, azerty, ㅃㅉㄸㄲㅆㅛ, あかさたなは.)

[Frenzie]

That's part of what I mean by unpolished. ;-)

But sure, I can probably polish it at least a little tomorrow.

[Frenzie]

[Frenzie]

@poire-z Do you think it's acceptable now for a first pass?

[poire-z]

Yep, looks fine to me.

[noembryo]

Just saw this and I wonder, should I change the el_keyboard.lua to make it that the Greek characters are default?

[Frenzie]

@noembryo If that's what people expect from a Greek keyboard then that's probably a good idea. Judging by this it looks like it should be delta for D, etc.?

[noembryo]

Yeap..
I'll try a PR (I did one already from the browser, maybe I'll try one from inside my IDE ;o)