Revert "removed the notifyDataChange on toggle column visibility, since it's irrelevant due to our hacks on how the grid menu handles visibility."
Revert "removed the notifyDataChange on toggle column visibility, since it's irrelevant due to our hacks on how the grid menu handles visibility."

This reverts commit 4c6e4a54e21d531f83ee24004b1f7b2b2d4db070.

InteractiveIntelligence/ng-grid,bartkiewicz/ui-grid,InteractiveIntelligence/ng-grid,bartkiewicz/ui-grid,bartkiewicz/ui-grid,InteractiveIntelligence/ng-grid