agg: removed the friend-class hacks for TfpgApplication and TfpgWindow
agg: removed the friend-class hacks for TfpgApplication and TfpgWindow

wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI