According to this thread, http://www.inductiveautomation.com/forum/viewtopic.php?f=70&t=5182&p=29906#p29906, this option is disabled and has no intention of being developed soon.
Please reconsider. Thanks.
I also would like to see this feature added. +1
I believe the grid object is likely to be one of the most highly used objects so this enhancement could get some immediate broad usage.
its my opinion that the table component is the most dynamic component in the ignition toolbox. anything that adds functionality to it is a + in my book.
+1 I would use this too