Steps to Reproduce:
1. Content & Data > Forms
2. Click the Add ( + ) button located top right.
3. Add any Element to the Form, name the form, and Publish.
4. Click the back arrow, or Content & Data > Forms
5. Click the Permissions on the Kebab menu for the Form that was created.
6. Try and click cancel.
Expected Results: User is able to leave the Permissions configuration.
Actual Results: User cannot leave the Permissions configuration using Cancel and the X button to leave is missing.
Master - Commit: d3ac85c54e61e3806068b6f5dcf6f1b18906c183