MacOS: further support of scenarios mixing miniaturize/deminiaturize/change screen configurations.

Test scenario:
- use 2-screen configuration, one retina, one non-retina as main screen
- put subwindow-containing window on retina
- miniaturize window
- close retina screen
- de-miniaturize window
The subwindow was wrong without this change.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@13131 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

src/Fl_cocoa.mm

@@ -1222,6 +1222,8 @@ static FLWindowDelegate *flwindowdelegate_instance = nil;
 {
   FLWindow *nsw = (FLWindow*)[notif object];
   Fl_Window *window = [nsw getFl_Window];
+  // don't process move for a subwindow of a miniaturized top window
+  if (window->parent() && [fl_xid(window->top_window()) isMiniaturized]) return;
   if (fabs([[nsw contentView] frame].size.height - window->h() * fl_graphics_driver->scale()) > 5.) {
     // the contentView, but not the window frame, is resized. This happens with tabbed windows.
     [self windowDidResize:notif];