
Closes #ISSUE_NUMBER

### I have:

- [ ] Formatted any Python files with [black](https://github.com/ambv/black)
- [ ] Brought the branch up to date with master
- [ ] Added any relevant Github labels
- [ ] Added tests for any new additions
- [ ] Added or updated any relevant documentation
- [ ] Added an Architectural Decision Record (ADR), if appropriate
- [ ] Added an [MPLv2 License Header](https://www.mozilla.org/en-US/MPL/headers/) if appropriate
- [ ] Updated the [Changelog](https://github.com/Flowminder/FlowKit/blob/master/CHANGELOG.md) 

### Description

Description of what this PR _does_, and what it _changes_.