BPGP Loot System

New features:

* Loot Popup Auto Pass: Auto-passing was fixed for TBC item stats and reworked. Switch between "Smart Pass" and "Hard Pass" has been removed from the Options and replaced with role-based Loot Filter located right in the header of BPGP main window. It allows hybrid classes to auto-pass on more loot (i.e. ignore feral and/or resto items as balance druid), and if all available roles are disabled, it automatically switches to old content farming mode, auto-passing on everything except mounts, recipes, bags and other non-equippable items. Loot Filter also comes with handy Lock button to protect from accidental clicking, which is enabled by default!