[Bug]: Rows don't adapt to content size

[Martmists-GH]

[sproctor]

Presently, row height needs to be constrained. It's part of the calculation of the column width. It might be possible to use a preferred height for the calculation, then make the rows taller on implementation. Currently, this use-case is not supported. The content should fit within the cell constraints. I don't have any plans on changing this. If you make a PR that implements this behavior and doesn't impact the non-expanding case, I'd merge it.