Bugfix/usability issues

 Fixed issue with clickable labels, minimized database requests, added methods to jquery extension.

- [x] test coverage
- [x] finish the code
- [ ] gather feedback for my changes


| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Tests pass?   |  no
| Fixed tickets | none
| Doc           | none