See minimal example here: https://gist.github.com/thelmstedt/2432b188aff575cff106

- Given a TableColumn, with CellFactory for generating Cells with wrapped Text elements
- Generate the UI, then add the data
- Although the content is off screen, there is no scrollbar
- Resize either the Column or the Whole screen: the scroll bar appears

There are two caveats to this bug, unfortunately not something I can hack in to an app:
   1) make the content much larger than the table (eg increase the number of rows to 20)
   2) put a long sleep in between adding items

I haven't dug down into the code but those two caveats make it seem that:
   1) wrapping isn't taken in to account for an initial table height, if the content was going to scroll initially (pre wrap) it still works. Problem seems to be when pre-wrap (no scroll) becomes post-wrap (scroll)
   2) wrapping might be happening a little late in the rendering process