title: Using collapsible panels within react-virtualized List
body: <p>I've managed to render a <code>react-virtulized List</code> to which I passed an array of <code>react-bootstrap Panels</code>. I've measured each of my rows, and via children callback, each time one of the child panels are clicked, an attribute in the parent state is updated. Said attribute is used inside the <code>react-virtualized List</code> <code>rowHeight()</code> function top check whether that panel is currently expanded. Then, using a <code>ref</code> to my <code>List</code>, i call the <code>recomputeRowHeights(index)</code> and <code>forceUpdateGrid()</code> methods on said<code>ref</code>.</p>
  <p>The thing is, while the List component correctly updates both the height and position of my rows, the animation isn't smooth. I mean, the bootstrap expand animation works fine, but the change in height of the expanded row happens instantly after the click event, and then the animation starts, feeling somewhat chopy.</p>
  <p>Is there any workaround for this, or is this an upcoming/planned/in the works feature for <code>react-virtualized</code>?</p>