title: Make Distraction Free mode show line numbers in Pycharm/Intellij
body: <p>Like the title suggests, when I use Distraction Free mode in PyCharm or Intellij I cannot see the line numbers, even though I have ticked the "line numbers" box in the settings. Is there a way to make the line numbers appear on Distraction Free mode? </p>
  
  <p>I'm using Linux (Ubuntu) if that helps (I saw a Mac picture where lines were being showed in Distraction Free mode) and my PyCharm version is 2016.2.3.</p>