Bump superdesk-core from 43b4fbd to 08243c3 in /client (#391)

Bumps [superdesk-core](https://github.com/superdesk/superdesk-client-core) from `43b4fbd` to `08243c3`.
- [Release notes](https://github.com/superdesk/superdesk-client-core/releases)
- [Commits](superdesk/superdesk-client-core@43b4fbd...08243c3)

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

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