TableView.editDelegate makes it so that editingFinished doesn't trigger on TextFields used for the editDelegate. I tried using Connectsion to onEditingFinished, but that did not succeed either. I had to work around it manually like this:
TableView.editDelegate: TextFieldCustom {
  TableView.onCommit:

{     editingFinished(); // shouldn't have to trigger this manually     model.display = ...;   }

 }