This is a 'developer mode' feature, and it can and does interfere
with preexisting key bindings in some applications, so keep it
off by default in stable releases, at least.
http://bugzilla.gnome.org/show_bug.cgi?id=754115
With the keybinding, it is possible that users may trigger the
inspector unintentionally. Show a dialog that informs them about
whats going on and gives them a chance to back out.
The warning dialog can be bypassed with the
org.gtk.Settings.Debug inspector-warning setting.
