title: QMessageBox open multiple times using shortcutkeys
body: <p>I am putting a QMesssageBox inline with the shortcutkey of CTRL + N (it means new file will be open). When I press and hold the shortcut key when the object is animating. Is it UI problem of Linux since I am using Linux OS and then I try in other OS and it is not happening, or any codes that I forgot? 
  Thank you.</p>