Updated release notes
Merge branch 'develop' into cleanup/467-date-format-consistency

Branch: cleanup/467-date-format-consistency
Get tests running, fix a few more places

- Tests needed updating for the new date formats
- Tests revealed some more places in the code that needed updating
- Also found a few more in manual testing
- Also changed the format that DatePicker uses to yyyy-mm-dd, like everywhere else

Ticket: #467
Branch: cleanup/467-date-format-consistency