Add mapCenter event handler to MapView
Add mapCenter event handler to MapView

Register handler with app aggregator on view 'onShow' and remove on
'onClose'.

AerodyneLabs/Stratocast,AerodyneLabs/Stratocast,AerodyneLabs/Stratocast,AerodyneLabs/Stratocast,AerodyneLabs/Stratocast