title: Adding custom font sizes to FontDialog
body: <p>I'm using <code>FontDialog</code> to set up some font parameters in my app.
  Unfortunately, I need some big font sizes - starting from 30 points, ending at 120 - 130 points.
  But pre-defined list of font sizes ends at 72 points, larger font size has to be typed in manually, which is extremely uncomfortable.</p>
  
  <p>So, the question is: can custom font sizes be somehow added to the font size list (e.g., it will look like "36 72 90 120 ...", where 90 and 120 are custom font sizes)?</p>
  
  <p>P.S. 
  It is not a good solution for me to use a custom control, as it is not very convenient. I'm rather satisfied with standard control except this issue.</p>
  
  <p>Thanks!</p>