* Create stokke/Y and Reduce
* Create stokke/R and Reduce (even if it can't reduce fully).
* Delete the truth table for Stokke/Y.
* Stack trace now happens when clicking on any table.
Traceback (most recent call last):
File "./kirq", line 470, in slotShowItemFromHistory
self.currentDataSetFile = widget.dataSetFile
AttributeError: 'NoneType' object has no attribute 'dataSetFile'