Do not autocomplete the user fields when editing another user.

course_enrolment_manager method should not always do a count_records and a get_records

Fix cibot warnings on line length.

Only if editing your own user details and not logged in as someone else.

* For consistency with the rest of navigation links in the tool, change
the Continue button to a Back link.

Set unique meaningful labels on all nav components rendered in the "boost" theme.