Profession Cooldown

Initial Wrath of the Lich king version.
Thank you to Arbixal / cavery-networkten for doing some initial work on this. I surely would have missed the glacial bag without this help!
Kept the changes to a minimum:
Added filters for Wrath and removed some of the old ones.
Updated dependencies.

Known errors:
The graying out of filters shows some slightly odd behaviour.
Learning new professions is not as smooth as it could be. Resetting character data may be needed when swapping profession.