Bug 8048 - better spacing on categories for attributes

Bug 8048 - better spacing on categories for attributes

 - Convert <h4> to <caption> and adding comfortable padding.
 - Add quotes to attribute for validity
 - Add padding to patron messaging note too since it has
   the same problem.

To test you must have at least one value added to the PA_CLASS
authorised value category. At least one patron attribute must
be categorized using that value.

On the patron edit screen that patron attribute category should
display with comfortable padding.

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Looks much better!

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