title: Qt WIdget inside ToolTip
body: <p>Is it, maybe by using some dirty hakish stuff, possible to use a <code>QWidget</code> as a tooltip or archive a similar mechanic?
  I want to have such a thing, because I have a list of some participants for a contest and would like to use a <code>QListView</code> for displaying everyone inside that contest when I hover the total participant count. I'm using <code>Qt5.3</code>.</p>