So GTK has its sweet new inspector, but it won't open via shortcut unless the org.gtk.debug settings schema is installed. We should set that up when you install the SDK metapackage
So this schema is installed with libgtk-3-dev. But do we want to also enable the keybinding by setting org.gtk.Settings.Debug enable-inspector-keybinding to true?
Porting from https://bugs.launchpad.net/elementaryos/+bug/1324202