Disable native mac file dialogs in GtkOnMac engine
Disable native mac file dialogs in GtkOnMac engine

There are some Cocoa initialization issues.

TheBrainTech/xwt,residuum/xwt,antmicro/xwt,lytico/xwt,cra0zy/xwt,hamekoz/xwt,mono/xwt,hwthomas/xwt,akrisiun/xwt