1. add student email info for unregistered student logs
2. add logic for getting available identification string for recent action button
3. make "all" & "test data" param persistent in ajax loading
1. add role for "Unregistered"
2. add icon for "Unregistered"
make case insensitive for person filtering
[2604]adminAcitivityLog: find a way to show activities by an unregistered user

fixes #2604