Multiple socialfields on one form cause "add more" and "remove" AJAX confusion

[jenlampton]

The "Add more" option still doesn't work for multiple socialfields on the same form. The AJAX callbacks don't seem to know which field they should uodate.

• The "add more" option often adds two rows into one field, if there are two fields on the page.
• The "Remove" option can also get confused between the two fields, and remove a service from both fields.

We need to find a way to pass the field name along to the callbacks, and only apply the changes to the appropriate field.