Modals with iframe but no footer have unnecessary bottom padding

• Type: Task
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: Master
• Component/s: JS APIs and Utilities
• Labels: None
• Epic Link: fi-provide-modal-patterns
• Sprint: S03E25 - Pango
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/88742

To reproduce, go Home page > Navigation app options > Configuration Templates

Expected result: no bottom padding

What actually happens: see screenshot

This was caused by LPS-110927, see more here.