Premium Ads Manager 2 by Siropu 2.6.5

Added Article prefix Position criteria option for Bob's AMS add-on.
Fixed an issue with group discounts to get the best discount if the user is in multiple groups.
Fixed an issue with discount calculation for background ads in front-end.

Added expired thread prefix admin option for Promo threads.
Fixed an issue with promo code max invoice value, getting a message when it is set to 0.
Fixed an issue with some ad types in ACP where tabs weren't working.