can't sort or delete "fields to display" in ‘Filter Results’ JIRA gadget in Confluence

Issue Summary

It is not possible to sort or delete items from "Fields to display" list in Filter Results Jira gadget in Confluence. after moving one field in the list it is not possible to reorder any of the fields.

Environment

• Confluence 6.15.2 / 6.15.8
• Jira v8.2.2 (Gadget Feeds)

Steps to Reproduce

1. Go to a page in Confluence > edit
2. insert more content > other macros > click on Filter Results
3. Next to Fields to display, try to delete or reorder the items

Expected Results

Should be able to delete and re-order "fields to display" items in the "Filter Results" macro.

Actual Results

Can't delete or re-order "fields to display" items in "Filter results" macro.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available