Data that is sent when the edit form is saved via HTTP POST
- id - The DOM id of the element that was edited
- form_type - The type of edit form that was used: text, textarea, select
- old_content - The pre-edited content of the element
- new_content - The edited version of the content
If the form_type is select then the following additional fields are also included
- old_option - The pre-edited select option value
- new_option - The edited select option value
- old_option_text - The pre-edited select option display text
- new_option_text - The edited select option display text