Ideally we would allow navigating into the button in the screen
reader case, so the configured clocks are read out properly.
However we can still do better than nothing short-term by pointing
to the section header as the button's label_actor.
https://bugzilla.gnome.org/show_bug.cgi?id=745393
x_align: Clutter.ActorAlign.START,
text: title });
layout.attach(header, 0, 0, 2, 1);
+ this.actor.label_actor = header;
for (let i = 0; i < this._locations.length; i++) {
let l = this._locations[i].location;