Grid Optimizations

GridGroupingControl is highly optimized to handle very high refresh and update scenarios. For the GroupingGrid, hooks were added that allow much more optimized ListChanged event logic to be plugged in. ListChanged logic was integrated into the main code base so that you can switch between old and new, more optimized code with only a few property settings. When frequent updates are being made in the grid, this has an optimal impact on the performance of the GridGroupingControl, enabling minimal CPU usage.