title: NSButton disabled title color always gray
body: <p>I have a custom NSButton, but no matter what i do, the disabled color is always gray</p>
  
  <p>I tried all solutions i came across</p>
  
  <ul>
  <li><p>i'am setting the attributed string title with white foreground color (i looks like the color attribute is ignored for the disabled state)</p></li>
  <li><p>i did set [[self cell] setImageDimsWhenDisabled:NO];</p></li>
  </ul>
  
  <p>event when the documentations states</p>
  
  <pre><code>// When disabled, the image and text of an NSButtonCell are normally dimmed with gray.
  // Radio buttons and switches use (imageDimsWhenDisabled == NO) so only their text is dimmed.
  @property BOOL imageDimsWhenDisabled;
  </code></pre>
  
  <p>it doesn't work</p>
  
  <p>My NSButton uses wantsUpdateLayer YES, so the draw methods are overwritten, but i don't understand, where the title is drawn</p>