Initial owner searching commit

Add owner searching
Fix sync interval logic
Depricate tracking click listener
Maintin user tracking in preferences - store the userid
SearchKeyword: Set a list of escape arguments
Changes table: Commit owner references account id as some users may not
 have an email
CommitCard: Remove the commiter object
Remove owner tracking card
UserChanges: Remove functions to list commits by owner, find commits
 should be used instead
Users: Add function to get user details from their userid

Change-Id: I1ef1d8534d314a2656eff0f41a97b7b3ea5fc152