Update slicers when changing RLS

[marti_montmany_]

Slicers don't update correctly when using RLS. They show the default value on slicer althought it does not exist for that RLS.

[DRKelly]

This is causing a lot of issues as people think based on the slicers available they have access to data they don't have access too. However if you take the field and represent it in Excel as a slicer the fields RLS have secured are all grayed out.