* endpoint/api/repository: limit the number of tags returned
- Limit the number of tags returned by /api/v1/repository/<ns:repo> to 500.
- Uses the tag history endpoint instead, with an active tag filte.
- Update UI to use tag history endpoint instead.
We no longer allow viewing individual images, but instead only manifests. This will help with the transition to Clair V3 (which is manifest based) and, eventually, the the new data model (which will also be manifest based)