Bump superdesk-core from b901fd3 to f4aaad9 in /client (#375)

Bumps [superdesk-core](https://github.com/superdesk/superdesk-client-core) from `b901fd3` to `f4aaad9`.
- [Release notes](https://github.com/superdesk/superdesk-client-core/releases)
- [Commits](superdesk/superdesk-client-core@b901fd3...f4aaad9)

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

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