Update checklist

1. Adds override tests
1. Adds connect clef account tests
1. Fixes a few small errors and cleans up a few odds and ends

The checklist is now fairly close to being “comprehensive.” The last bit that might be slightly out of sync with 2.0 is the onboarding login counter bit. If this is important to include, I will need @landakram’s help to update the test to match the updated feature.