Bug 7670 - make required fields red

Bug 7670 - make required fields red

Adding "required" style and "Required" note to additem fields,
consistent with the way required fields are displayed
on the add patron form.

This patch also corrects an error in the client-side validation
script which misidentified which fields were required. Leaving
a required field empty should result in an alert and the missing
field being highlighted in yellow.

To test, open the add item form on a record which uses
a framework in which one or more item fields are required.
Required fields should be labeled in red and appended with a
"Required" note.

Submit the form while some required fields are empty. You should
see a javascript alert. The empty mandatory fields should have
a yellow background.

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Works - passes tests.

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>