Summary:
- Fixing port allocation in TestServer
- Extending logging in the Billing test
- Fixing negative rowIds support for add/remove actions
- Making FormulaEditor and CardView tests less flacky
Test Plan: Existing
Reviewers: paulfitz
Reviewed By: paulfitz
Subscribers: paulfitz, dsagal
Differential Revision: https://phab.getgrist.com/D4280