IgbGrid does not fire ColumnToggle / any event when pressing Hide All or Show All in the IgbGridToolbarHiding

[agoldenbaum]

Steps to Reproduce:

1. Run the attached sample project.
2. Open the IgbGridToolbarHiding dialog
3. Set a breakpoint in OnColumnToggle or ToggleScript
4. Click the "Hide All" and "Show All" buttons

Result:
Events are never fired, and there does not appear to be any event associated with these buttons.

IgbGridResetDemo.zip