title: Qt: QListView change behaviour of MultiSelection selection mode
body: <p>I have QListView with MultiSelection option for selecting items. </p>
  
  <pre><code>listView-&gt;setSelectionMode(MultiSelection);
  </code></pre>
  
  <p>It is exactly what I want except one thing. I don't want a deselect behaviour on drag select(When I'm dragging over selected items they become unselected). I want items below drag selection to be always selected.</p>
  
  <p>Is there a way to change this behaviour?</p>
  
  <p>UPDATE: Wrapping is enabled so items are drawn in a couple of lines.</p>