We changed vivo:hasResearcherRole to be admin only. Now a regular user who tries to hide or show grants/project does not see that link. When we dropped the display and update privileges of vivo:hasResearchRole to public, then the option showed up again.
This seems to be true even for admin users such as myself.
We believe an analogous problem is occurring with publications. Because we made some publication properties admin-only, the option to hide pubs is also unavailable.