Second attempt to fix hanging RPCS3 process

Now fix exit logic a bit.
Remove Init() call from Stop().
Remove Stop() call from Quit().

rpcs3/rpcs3qt/main_window.cpp

@@ -2227,6 +2227,7 @@ void main_window::closeEvent(QCloseEvent* closeEvent)
 	}
 
 	// Cleanly stop and quit the emulator.
+	Emu.Stop();
 	Emu.Quit(true);
 }