When not using arrow notation with anonymous functions, we use Lang.bind()
to bind `this` to named callbacks. However since ES5, this functionality
is already provided by Function.prototype.bind() - in fact, Lang.bind()
itself uses it when no extra arguments are specified. Just use the built-in
function directly where possible, and use arrow notation in the few places
where we pass additional arguments.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/23
Show a dialog informing the user each time the keyboard accessibility
flags are changed by one of the clutter backends (either from toggle
keys or two-keys-off modifiers).
https://bugzilla.gnome.org/show_bug.cgi?id=788564