Behaviors tabs not shown in nested paragraph fields when paragraph form is rendered in a modal

Problem/Motivation

The paragraph behaviors tabs are not rendered when behaviors are present on a nested paragraph, and the parent paragraph form is rendered in a modal (as is the case for Layout Paragraphs).

Steps to reproduce

Install Layout Paragraphs. Configure a nested a paragraph type that uses paragraph behaviors. Create a paragraph reference field on a content type that uses Layout Paragraphs, but use the stable Paragraphs widget for the nested paragraph. The behavior tabs will not render in the paragraph form.

Proposed resolution

Improve logic in the Paragraphs stable formatter for choosing whether or not to render tabs.

Remaining tasks

Patch / MR

User interface changes

None, accept that the behavior tabs will correctly render for nested paragraphs using Layout Paragraphs.

API changes

None.

Data model changes

None.