This patch adds an additional control to KeyboardSettings allowing
the user to map Caps Lock to Ctrl. Previously, this was only possible
by writing to /sys/kernel/variables/caps_lock_to_ctrl.
Writing to /sys/kernel/variables/caps_lock_to_ctrl requires root
privileges, but KeyboardSettings will not attempt to elevate
the privilege of the user if they are not root. Instead, the
checkbox is rendered as un-editable.
We have a new, improved string type coming up in AK (OOM aware, no null
state), and while it's going to use UTF-8, the name UTF8String is a
mouthful - so let's free up the String name by renaming the existing
class.
Making the old one have an annoying name will hopefully also help with
quick adoption :^)
Previously only the list of allowed keymaps could be modified and
applied to the system.
Add a new button to activate the selected keymap from the list. When
applying the changes to the system, also apply the active keymap.
Right now, this is a bit of a hack. We can't set a keymap to only apply
to the test area, so we set the system keymap instead, while also
keeping track of the "real" current keymap. Whenever the settings are
applied, we update what that "real" keymap is, and when we exit, we
revert to that keymap.
Basically, it behaves as you would expect, apart from it also affecting
other applications you are typing in while the KeyboardSettings window
is open with a different keymap selected.
