Comment 79 for bug 124440

I agree, it's a perfectly valid request...

Just realistically it probably won't get fixed in Unity7's 'gnome-control-center (Ubuntu)' as that gets replaced by Unity8's 'ubuntu-system-settings (Ubuntu)'.

More more importantly; see comment #51 where I pointed out that Linux is so eclectic that it's probably not feasible to ever fix this in an X11-based system, except separately for each class of GUI toolkit. Even with the introduction of Unity8 it will be similarly difficult, made easier only in that we control and author the low-level input system (Mir).