Table cell constraints working at first then failing.

[nathanbrakken]

I'm using MotionKit to style some of my form cells for constraints, it appears to work on load, the cell grows and shrinks with the text.

Once I scroll, however, I get a warning:

 Warning once only: Detected a case where constraints ambiguously suggest a height of zero for a tableview cell's content view. We're considering the collapse unintentional and using standard height instead.

I know that PM::TableScreen has the ability to set the estimated row height with:

  row_height :auto, estimated: 100

but I get this error when I add the code:

 undefined method `row_height:estimated:' for FormScreen::Class (NoMethodError)

Any ideas on how to get this to work with my form?