Bug 23625: ArticleRequestsMandatoryFields* only affects field labels, does not make...

Bug 23625: ArticleRequestsMandatoryFields* only affects field labels, does not make inputs required

Test plan:

1. Enable article requests ( syspref: ArticleRequests => Enable, Circ and fine rules ALL/ALL (or a given category/itemtype): Article requests => Yes )
2. Set one or more fields to require in the ArticleRequestsMandatoryFields, ArticleRequestsMandatoryFieldsItemOnly, and/or ArticleRequestsMandatoryFieldsRecordOnly settings (all these settings are affected in the same manner)
3. Search for a title and select the "Request Article" button from the OPAC search results
4. Authenticate as a patron
5. Neglect to fill out at least one of the mandatory fields
6. Select the "Place Request" button at the bottom of the form
7. The form submits despite the empty mandatory fields
8. Apply patch
9. Repeat steps 3, 5, & 6
10 . The form should refuse to submit, show a browser-native message about the missing required fields.

Sponsored-by: California College of the Arts
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>