Browsing Pampangan translation

Keep this string in sync with gnome-control-center/capplets/display/xrandr-capplet.c:get_display_name()
Translators:  this is the feature where what you see on your laptop's
* screen is the same as your external monitor.  Here, "Mirror" is being
* used as an adjective, not as a verb.  For example, the Spanish
* translation could be "Pantallas en Espejo", *not* "Espejar Pantallas".