fix(common/core): Turn off capslock on key down

This change improves capslock handling with a capsAlwaysOff keyboard.
Previously, the caps lock indicator was turned on while holding down
the Caps Lock key. With this change we turn it off immediately. This
is done by forcing caps lock off even if the state already seems to
match.

Also, for capsAlwaysOff keyboards skip further processing of caps
lock key after we turned capslock off again.