Based on mantis : http://mantis.team-mediaportal.com/view.php?id=4145
Column was set FullRowSelect to CellSelect to be able to copy/paste action field only.
This fix add a regression -> row can't be remove.
Adding a empty field create an exception, if it stay empty.

h4. Steps to Reproduce
Try to add a new value (empty).
If you add action value in a correct row and hit enter -> exception occurs (it's an old bug but only detected recently)
If you want to remove the line -> it failed.

h4. Additional Information
Current fix :
Correct code to remove line.
Fix exception.