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### First time contributor checklist:

- [ ] I have read the [README](https://github.com/signalapp/Signal-Desktop/blob/master/README.md) and [Contributor Guidelines](https://github.com/signalapp/Signal-Desktop/blob/master/CONTRIBUTING.md)
- [ ] I have signed the [Contributor Licence Agreement](https://signal.org/cla/)

### Contributor checklist:

- [ ] My contribution is **not** related to translations. _Please submit translation changes via our [Signal Desktop Transifex project](https://www.transifex.com/signalapp/signal-desktop/)._
- [ ] My commits are in nice logical chunks with [good commit messages](http://chris.beams.io/posts/git-commit/)
- [ ] My changes are [rebased](https://medium.com/free-code-camp/git-rebase-and-the-golden-rule-explained-70715eccc372) on the latest [`development`](https://github.com/signalapp/Signal-Desktop/tree/development) branch
- [ ] A `yarn ready` run passes successfully ([more about tests here](https://github.com/signalapp/Signal-Desktop/blob/master/CONTRIBUTING.md#tests))
- [ ] My changes are ready to be shipped to users

### Description

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