[OS/2] Bug 500379: fix focus behavior when activating windows after the big focus change landed, p=Rich Walsh, r=pweilbacher

widget/src/os2/nsFrameWindow.cpp

@@ -468,6 +468,13 @@ MRESULT nsFrameWindow::FrameMessage( ULONG msg, MPARAM mp1, MPARAM mp2)
             }
          }
          break;
+      case WM_ACTIVATE:
+         DEBUGFOCUS(frame WM_ACTIVATE);
+         if (SHORT1FROMMP(mp1) &&
+             !(WinQueryWindowULong(mFrameWnd, QWL_STYLE) & WS_MINIMIZED)) {
+            bDone = DispatchFocus(NS_ACTIVATE);
+         }
+         break;
    }
 
    if( !bDone)