title: Disable automatic scrolling when clicking an item
body: <p>I have a QTreeView with a custom item delegate. The delegate creates an editor that can be very wide (let's say, 2000px width), so the user will scroll horizontally to edit the data.</p>
  
  <p><img src="https://i.stack.imgur.com/o0AqH.png" alt="Step 1"></p>
  
  <p>Image 1: I scrolled to the frame #300. Notice that the scrollbar is already offseted.</p>
  
  <p><a href="http://imageshack.us/a/img801/9887/image2zb.png" rel="nofollow noreferrer">Step 2 http://imageshack.us/a/img801/9887/image2zb.png</a></p>
  
  <p>Image 2: I click some part of the editor; then the scrollbar goes to the starting position automatically. It happens because the current selected row have changed. Is there any way to disable the automatic scrolling?</p>
  
  <p>Thanks!</p>