Minor OSK fixes
Fixes one possible exception when updating keymaps (i.e. adding/removing) because of a leftover function call. And makes the Key object offer its topmost actor on key.actor, instead of key.container, for conformity.
Fixes one possible exception when updating keymaps (i.e. adding/removing) because of a leftover function call. And makes the Key object offer its topmost actor on key.actor, instead of key.container, for conformity.