LP#1553813 Patron editor validation / perm checks.

LP#1553813 Patron editor validation / perm checks.

1. Adds support for enforcing ui.patron.edit.*.require and
ui.patron.edit.*.regex org unit settings via Angular's ng-pattern and
ng-required attributes.

2. Supports selecting only valid profile groups and home org units.

3. Warns the user when a duplicate barcode or username is encountered.

When any fields in the form are invalid, the save options are disabled.

==

Adds support for enforcing the following permissions:

UPDATE_USER
CREATE_USER
CREATE_USER_GROUP_LINK
UPDATE_PATRON_COLLECTIONS_EXEMPT
UPDATE_PATRON_CLAIM_RETURN_COUNT
UPDATE_PATRON_CLAIM_NEVER_CHECKED_OUT_COUNT
UPDATE_PATRON_ACTIVE_CARD
UPDATE_PATRON_PRIMARY_CARD

Signed-off-by: Bill Erickson <berickxx@gmail.com>