Fixed rubric template preview

I fixed the errors of missing variables in the rubrics template
preview by adding the missing variables in the RubricEval demo data.

I've also remove the use of "_t" from some of the ctp files which were
left when we transition back to __("", true).
removed resetpasswordpermission check from users index

Somehow the permissions checking function was left in the index when
it was designed only for the two reset password functions.