datetime: setting can_focus to true on listbox rows

https://bugzilla.gnome.org/show_bug.cgi?id=707778
universal access: fixing can_focus value on several main view rows

https://bugzilla.gnome.org/show_bug.cgi?id=707778
universal access: toggle child switch if parent list box row is activated

Focusing on the main view.

https://bugzilla.gnome.org/show_bug.cgi?id=707778