linux: Don't insert characters if modifiers other than shift are held (#33424)

Closes #32219 #29666

Release Notes:

- Linux: Now skips insertion of characters when modifiers are held. Before, characters were inserted if there's no match in the keymap.
dfdeb1bf51Michael Sloan committed on 6/25/2025, 11:11:59 PM· committed by GitHubparentb9f81c7
2 files changedLine totals unavailable