Fix cityUI buttons staying 'depressed' after opening a window
Fix cityUI buttons staying 'depressed' after opening a window

Use ButtonClick event instead of MouseDown - more consistent with other
buttons and fixes them not getting the raise event

pmprog/OpenApoc,ShadowDancer/OpenApoc,pmprog/OpenApoc,steveschnepp/OpenApoc,steveschnepp/OpenApoc,Istrebitel/OpenApoc,AndO3131/OpenApoc,Istrebitel/OpenApoc,FranciscoDA/OpenApoc,FranciscoDA/OpenApoc,FranciscoDA/OpenApoc,ShadowDancer/OpenApoc,AndO3131/OpenApoc,AndO3131/OpenApoc