title: How to make a resizable rectangle in QML?
body: <p>I'm looking for a simple way to create a rectangle in a <code>QQuickItem</code>.
  I want to resize, and drag the borders of this rectangle like this (found at <a href="https://stackoverflow.com/questions/19066804/implementing-resize-handles-on-qrubberband-is-qsizegrip-relevant">resizable <code>QRubberBand</code></a>)</p>
  
  <p><img src="https://i.stack.imgur.com/Ut0Eq.png" alt="enter image description here"></p>
  
  <p>Has someone an idea?</p>