[FEATURE] Extended TCAs for Structured Data (SEO)

See merge request !20

This ensures the schema is always valid. Otherwise, it could end with a
comma which is seen as invalid schema.

[FEATURE] Introduce the path_segment field that allows to give proper URLs yourself, Also a lot of cleanup was done

[TASK] Disable manual sorting and add small notification

See merge request !19

F manual sorting

See merge request !18