Fixed Bugs

#2303 Filter by Type in Audit History list causes Tp.QueryExtensions
#2304 Filter by Date in Impediments list causes Tp.QueryExtensions
#2305 Filter by EndDate+Hide Old in Releases lists causes Tp.QueryExtensions
#2468 Request View: Priority property is missing in details
#2582 Help Desk: Email with incorrect link send to end users (requesters) when admin adds comment
#2552 Help Desk: Incorrect project selected when click on Request name in Help Desk list
#2584 Can't bind existing user stories and bugs to Requests