WowAce

Adirelle:
    - Removed unused code.
    - When tidying bags, try to complete stacks before moving them into profession bags.
    - Fixed a nil error with regard to stacks.
    - Fixed bag/container family issues in TidyBags and when emptying bags.
    - Moved utility functions into their own file.
    - Do not dispatch items again when a new items is removed from the bags.
    - Item buttons that are just moved around need to be refreshed.
    - Tweaked bag layout in order to prevent sections from bouncing around when moving stuff.
    - Properly open and close the backpack when starting/stopping to talk to merchants.