Bump superdesk-core from c32bc2d to ff3da34 in /client (#496)

Bumps [superdesk-core](https://github.com/superdesk/superdesk-client-core) from `c32bc2d` to `ff3da34`.
- [Release notes](https://github.com/superdesk/superdesk-client-core/releases)
- [Commits](superdesk/superdesk-client-core@c32bc2d...ff3da34)

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

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