RadFormDecorator does not update properly the state of the grid row checkboxes when Select all checkbox is clicked and the skin is different than Default.

video - https://www.screencast.com/t/lwAfXhgEAs

The bug is introduced with R1 2017 release.

Steps to reproduce:
1. Open http://demos.telerik.com/aspnet-ajax/formdecorator/examples/formdecoratorandtelerikcontrols/defaultcs.aspx?skin=Silk
2. Click the "Select All" checkbox of the first Grid

Result: The row checkboxes are not checked

ISSUE 2: Batch Edit mode checkboxes are not updated. Change a few checkboxes in this demo, they all remain unchecked after you close the cell: http://demos.telerik.com/aspnet-ajax/grid/examples/data-editing/batch-editing/defaultcs.aspx
Workraounds:
- remove the RadFormDecorator
- OR, have it skip checkboxes, e.g.: DecoratedControls="All" ControlsToSkip="CheckBoxes"