Flexible Content Layouts Truncated When Insufficient Form Content Present

[ecoughtry]

When utilizing the Whitecube\NovaFlexibleContent package to add multiple layout options within a Nova Resource, the layout options are being truncated in the UI if the overall form content does not fill the screen. This results in some layouts being inaccessible because they do not appear within the dropdown.

[alekmlynek]

I think this is a duplicate of: #488

Cause of issue:
This is the issue: laravel/nova-issues#6096