title: Pressing Tab in QTextEdit in Dialog - change behavior
body: <p>I have <code>QDialog</code> that contains few buttons and a <code>QTextEdit</code>.
  after writing something in the <code>QTextEdit</code>, I press tab in order to get to one of the buttons, but when I pressing tab, a tab space is added to the <code>QTextEdit</code>. How can I change this behavior?</p>