Change log

1. Clarified the error message when you attempt to use/move bag items with the trainer frame open. DemonTrainerFrame has ALWAYS blocked any attempt to move, modify, or sell inventory items while the trainer frame is open; however, in wow2.0 the method used to block such transactions caused the "Blizzard blocked" message. Since this continued to confuse players, I have reworked the blocking mechanism to provide a more descriptive error message. You must close the demontrainer window before learning grimoires, modifying inventory, selling items, using items, etc.

2. The beta servers have introduced some form of bug causing perfectly legitimate tooltip handlers to give UI errors. I've implemented a work around that seems to keep DTF working despite the bug on the beta servers.