Closes #276 #275
Additional implementations:
- Frontend Semantic search (units, concepts) completely overhauled, allow URIs and retrieve label in Semantic Service
- Reworked interfaces of list tables, list queries, list views and fixed PID interface (add license for DBs again)
- Reduced number of loading data from backend drastically
- Gitlab CI/CD coverage reports for Metadata Service
- Various Frontend bugs (glitching, loading)