Revert "create main menu before confirm for being disconnected"

This reverts commit acd1f23.

This unfortunately makes the problem worse. I can't test proposed
solutions to this issue until the main menu background re-render
finishes, which should be later today.

src/game/client/swarm/gameui/swarm/uigamedata.cpp

@@ -1249,8 +1249,8 @@ void CUIGameData::OnEvent( KeyValues *pEvent )
 		CBaseModPanel::GetSingleton().CloseAllWindows( CBaseModPanel::CLOSE_POLICY_EVEN_MSGS );
 
 		// Show the message box
-		CBaseModFrame *pMainMenu = CBaseModPanel::GetSingleton().OpenWindow( WT_MAINMENU, NULL );
-		GenericConfirmation* confirmation = static_cast<GenericConfirmation*>( CBaseModPanel::GetSingleton().OpenWindow( WT_GENERICCONFIRMATION, pMainMenu ) );
+		GenericConfirmation* confirmation = static_cast<GenericConfirmation*>( CBaseModPanel::GetSingleton().OpenWindow( WT_GENERICCONFIRMATION, NULL, false ) );
+		CBaseModPanel::GetSingleton().OpenWindow( WT_MAINMENU, NULL );
 
 		GenericConfirmation::Data_t data;