Adapt UI to support new metastructure for mapped concepts
- Restore original behavior first
- Allow N:1 for source ->mapped concept
(from redmine: issue id 539, created on 2018-01-22tgradl, closed on 2018-01-22)
- Relations:
- relates #536 (closed)
(from redmine: issue id 539, created on 2018-01-22tgradl, closed on 2018-01-22)