title: Avoid QTreeWidget scrolling where it wants after selecting item
body: <p>Inside QTreeWidget implementation, after receiving the signal "item selection changed" and "item selected", it positions the scroll down to put the selected item just in the bottom.</p>
  
  <p>It there is no scrollbar, everything goes perfect. Does nothing.</p>
  
  <p>I tried many approaches, but it is changed just after i receive those selection signals and position the ScrollBar where i want.</p>
  
  <p>How can i avoid qt doing that? It is very annoying to select something and then seeing it moving around, not staying in the same position i clicked!. </p>
  
  <p>I understand if it does it when you select an item which is not visible. But i want to choose what to do!.</p>