title: Hide tooltip of truncated checkbox
body: <p>I have a checkbox which is resized together with my main form. The text of this checkbox has some relevant information, so it got an own tooltip control (with mutliline content).</p>
  
  <p>If the form gets small enough the text of my checkbox is truncated (AutoEllipsis = true). But if i move my mouse over this control i get two tooltips which overlap each other. The first shows the complete text of the truncated checkbpox and the second shows the tooltip i added in the code.</p>
  
  <p>I presume that the first tooltip is caused by setting the AutoEllipsis property to true?
  What can i do to prevent this builtin tooltip to be shown? I didn't find any properties i could overload or something...
  If possible I would like to keep the AutoEllipsis property as it handles the truncation of too large text.</p>