Bump superdesk-core from ec7dba0 to 5c80d6d in /client (#170)

Bumps [superdesk-core](https://github.com/superdesk/superdesk-client-core) from `ec7dba0` to `5c80d6d`.
- [Release notes](https://github.com/superdesk/superdesk-client-core/releases)
- [Commits](superdesk/superdesk-client-core@ec7dba0...5c80d6d)

---
updated-dependencies:
- dependency-name: superdesk-core
  dependency-type: direct:production
...

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