def go_back(*ignore):
"""Return the map view to where the user last set it."""
history = list(Gst.get('history'))
lat, lon, zoom = history.pop()
if valid_coords(lat, lon):
MapView.set_zoom_level(zoom)
MapView.center_on(lat, lon)
if len(history) > 1:
Gst.set_history(history)
else:
Gst.reset('history')
