Hotfix for Checkout Mutations

[chrismaddalena]

Summary

This includes a pair of small bug fixes. It also includes CHANGELOG and version updates for v4.2.2.

CHANGELOG

Fixed

• Fixed a server error that could occur when using the checkoutServer and checkoutDomain mutations in the GraphQL API and providing a null value for the note field
• Fixed the "My Active Projects" sidebar dropdown not showing the correct message if all projects are marked as complete

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 91.97%. Comparing base (2293484) to head (7648978). Report is 3 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #475 +/- ## ======================================= Coverage 91.96% 91.97% ======================================= Files 314 314 Lines 18132 18146 +14 ======================================= + Hits 16675 16689 +14 Misses 1457 1457 ```

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