Contract adjustments

Block Hours/Limited hours remaining shown on the clients open tickets - so you dont need to go to the relevant contract to see what is remaining, its always shown on the ticket.

Available/Remaining hours update without requiring the ticket to be closed - When you add a time entry, it should allocate off the available hours automatically. If you delete a time entry, it returns the hours automatically. If we have to wait for a ticket to be closed then there is the possibility several open tickets can consume available hours that then causes an issue at billing time, especially if customer hasnt approved extra billable hours (or we havnt asked as we didnt know we needed to).