title: Disable main window's title context menu
body: <p>I am developing a windowed application with Qt, C++ on embedded Linux. Using QApplication type of QApplication::GUIServer</p>
  
  <p>I am trying to disable the context menu that pops up when user right clicks on application title area, the one that gives the options to resize, move, close, etc. the application.</p>
  
  <p>I already tried setting ContextMenuPolicy to PreventContextMenu on main window and giving a custom context menu handler to main window.</p>
  
  <p>Thanks in advance.</p>