Revert "Root screen covers the whole screen and all screens are centered"

This reverts commit 708c783.

Author: orengg

Menus/MainMenuGUI.cpp

@@ -195,15 +195,13 @@ int MainMenuGUI::Create(Controller *pController)
     m_apScreenBox[QUITSCREEN] = dynamic_cast<GUICollectionBox *>(m_pGUIController->GetControl("QuitConfirmBox"));
     m_apScreenBox[MODMANAGERSCREEN] = dynamic_cast<GUICollectionBox *>(m_pGUIController->GetControl("ModManagerScreen"));
 
-	m_apScreenBox[ROOT]->Resize(g_FrameMan.GetResX(), g_FrameMan.GetResY());
-
-	for (int iscreen = MAINSCREEN; iscreen < SCREENCOUNT; ++iscreen)
-	{
-		if (m_apScreenBox[iscreen]) {
-			m_apScreenBox[iscreen]->CenterInParent(true, true);
-		}
-	}
+	GUICollectionBox *pRootBox = m_apScreenBox[ROOT];
+    pRootBox->SetPositionAbs((g_FrameMan.GetResX() - pRootBox->GetWidth()) / 2, 0);// (g_FrameMan.GetResY() - pRootBox->GetHeight()) / 2);
+// NO, this screws up the menu positioning!
+//    pRootBox->Resize(pRootBox->GetWidth(), g_FrameMan.GetResY());
 
+    // Set up screens' initial positions and visibility
+    m_apScreenBox[QUITSCREEN]->CenterInParent(true, true);
     // Hide all screens, the appropriate screen will reappear on next update
     HideAllScreens();