Add activity type search filter to employees advanced table search.
Patch USF person import bug to always provide a DisplayName for Person.
Give activity type checkbox filters their own submit button.
Draw date search boxes & implement exclude undated activities.
Implement date filters for employee activity search table.
Fix bug with activity until date search filter, should include ongoing.
Bind activity type search checkboxes to viewmodel for check / uncheck all.
Add controls for date filters to employee activity search table.