Show disabled Admin and Active fields

Show the Admin and Active fields when editing your own user profile as administrator, disabled and with a tooltip to clarify that they are read-only.

Rationale for this change: when I was testing, I freaked out a bit when I didn't see the Admin and Active checkboxes for a user... especially as it was me :-)  Thought that it had to be a database issue, to then find they are excluded for the form especially for me (or: You).