rsx: Improve gs frame exit workaround

Move to close(), hide before potential hanging at Emu.Stop()

rpcs3/Emu/RSX/GSRender.cpp

@@ -20,7 +20,6 @@ GSRender::~GSRender()
 
 	if (m_frame)
 	{
-		m_frame->hide();
 		m_frame->close();
 	}
 }

rpcs3/rpcs3qt/gs_frame.cpp

@@ -286,12 +286,17 @@ bool gs_frame::get_mouse_lock_state()
 
 void gs_frame::close()
 {
-	if (!Emu.IsStopped())
+	Emu.CallAfter([this]()
 	{
-		Emu.Stop();
-	}
+		QWindow::hide(); // Workaround
 
-	Emu.CallAfter([this]() { deleteLater(); });
+		if (!Emu.IsStopped())
+		{
+			Emu.Stop();
+		}
+
+		deleteLater();
+	});
 }
 
 bool gs_frame::shown()