Sort the list comprising the set of keys for the binding in ascending
order. (Keyboard shortcuts depend only on the set of simultaneously
pressed keys, not their order, so this change should have no external
effect.) This simplifies comparisons between bindings.
Adds the --locked flag to bindsym and bindcode commands.
When a keyboard's associated seat has an exclusive client
(i.e, a screenlocker), then bindings are only executed if
they have the locked flag. When there is no such client,
this restriction is lifted.
