Revert "SECURITY FIX: Fix package uids being reused between uninstall and reinstall of different packages."

This reverts commit 29b049779e922d89d4e98d5d1d47f8e945c3ad24.
Revert "Fix scrollbars appearing out of place in Superuser."

This reverts commit 0e5230c0dd6835391be84552716b8ca5deaef3f9.
Revert "Switch to new Superuser"

This reverts commit 9ece21c76707e6367df8a2acb8fff88d4d984321.
Revert "Revert "Add superuser""

This reverts commit 3176fc63fbc9c76a0912eb91b2b18bb18f3ff1cb.