Mac: QPrintDialog blocks shortcuts (cmd+v, cmd+a, etc.)

In QPrintDialog, keyboard-shortcuts like cmd+a, cmd+v, cmd+x, cmd+c are blocked.

Steps to reproduce:

• Open a Qt-Example with PrintDialog (e.g. textedit.app)
• Choose 'Print'
• In upcoming printdialog choose e.g. 'save as pdf'.
• try to set 'save as:', 'title' per cmd+v
• try to copy a given filename per cmd+c