Bug 35044: Preparation:

Bug 35044: Preparation:

get_additional_field_values_for_template method

New method to be utilized for retrieval of additional fields of any
class that implements it.
This is to be used when additional_fields are needed to be sent to .tt
files for renderering. Both for form entries and read-only 'show' pages.

Template files:

Updated additional-fields-entry.inc:
Now considers entry of repeatable fields.
Repeatable text fields will have a "+New" link to allow for adding of a
new instance of a repeatable field.
Repeatable AV fields will be shown as checkboxes instead of a dropdown

Update additional-fields-display.inc
When displaying non-editable additional-fields, multiple instances for
each field are now considered.
Label now only shows if field has a non-null value in it.
Option to show value_only
Option to set if its to be displayed on a table cell

Update histsearch.tt and filter-orders.inc
Now calls additional-fields-entry.inc with search_form=1 to prevent
repetable "+New" controls from showing on search inputs.

additional-fields-entry.js
New JS asset to be called by template files who require
additional-fields-entry.inc for repeatable fields controls.
This also handles the need for having the marcfield of type
'get' submitted if it is a disabled dropdown (AV marc field)

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>