Add drowl_layouts/layout_paragraphs_admin as dependency in drowl_paragraphs/admin library

For the records: In theory DROWL Paragraphs works without DROWL Layouts, so this feels not 100% clean. But as this reduces complexity, this should be fine. It will probably cause a CSS overhead in cases where Paragraphs is used without Layout Paragraphs (so => drowl_paragraphs without drowl_layouts).

Automatically closed - issue fixed for 2 weeks with no activity.