Revert "Superuser: Don't duplicate 'Allow' string"

On a second thought, this is plain confusing for translators.
I'd like to keep the ~350 people who translate happy.

This reverts commit 6af4772b0172cb3e0b70f2ab5b961139f404e621.

Change-Id: I6b1a82ed3292aa98b0d340d6dd9e90de8791b05d