Smart UI gurus.....
Is there a means to hide in the Smart UI header the search and favourites icons based upon user's role/rights. I'm looking to hide the search option as users don't have access to the search templates, therefore the search cannot be executed anyway and I want to "force" navigation to find content. The favorite button, not so fussed. Both these should be based on user's role - i.e. if they belong to a specific group, then hide them. For reference

Additionally, is it at all possible to revoke the "Classic view" option under the user icon at top right - again, based on role or some other logic. Again, I have some users whom we want to "discourage" from reverting to the Classic UI , but others who will work between the two.
These changes need to be consistent throughout the system.
Is this at all possible and any hints on how?