Backend admin cannot perform file operations in filelist
Each user (also admin users) in the backend can be defined with specific fileoperation permissions. If an admin user has no permissions here he's not allowed to e.g. create a new directory in the filelist module (fileadmin).
However, an admin is allowed to change its permissions in the be_users table. Thus, there should not be a check in the filelist module against the mentioned fileoperation permissions for admin users.
(issue imported from #M10642)