title: NSTextField not editable in custom NSWindow
body: <p><strong>Hi everyone,</strong></p>
  
  <p>If I create NSTextField in my controller's view then all is fine - the field is editable.
  Unfortunately, I have to create NSTextField in new custom NSWindow. My code bellow produces a field which looks like without focus (text selection is gray) and is not editable (no cursor and no reaction to key strokes). I can change the text selection with mouse but that is all.</p>
  
  <p>Do I have to enable the NSWindow to receive key strokes?</p>
  
  <p>Appreciate your help,
  <strong>--Josef</strong></p>
  
  <pre><code>      NSRect windowRect = [[self.window contentView] frame] ;
        NSWindow* uiWindow          = [[NSWindow alloc]  initWithContentRect:windowRect
                      styleMask:NSBorderlessWindowMask
                      backing:NSBackingStoreBuffered defer:YES];
        [uiWindow setBackgroundColor: [NSColor redColor/*clearColor*/]];
        [uiWindow setOpaque:NO];
  
        NSView* uiView = [[[NSView alloc] initWithFrame:NSMakeRect(0, 0, windowRect.size.width, windowRect.size.height)] autorelease];
        [uiView translateOriginToPoint:NSMakePoint(100, uiView.bounds.size.height/2)];
        uiView.wantsLayer = YES;
  
        [uiWindow setContentView:uiView];
  
        NSTextField *textField;
        textField = [[NSTextField alloc] initWithFrame:NSMakeRect(0, 0, 800, 80)];
        [textField setFont:[NSFont fontWithName:@"Helvetica Bold" size:60]];
        [textField setStringValue:@"My Label"];
        [textField setBezeled:YES];
        [textField setDrawsBackground:YES];
        [textField setEditable:YES];
        [textField setSelectable:YES];
        [textField setEnabled:YES];
  
        [uiView addSubview:textField];
  
  
  // THIS DOES NOT WORK
  [self.window addChildWindow:uiWindow ordered:NSWindowAbove];
  
  // THIS WORKS
  //[_graphicView addSubview:uiView];
  </code></pre>