[SDP] TrainAll

I've uploaded a workaround for LoadWith not working on Classic and BCC. This update will be reverted once Blizzard gets around to fixing this bug.

Adds a simple "Train All" button to tradeskill and class trainers that allows you to learn all available skills with a single click.

Contact:

I'm open to questions and suggestions. Feel free to message me here or post in the comments.

I'm also available for support on the WoWUIDev Discord, @mention me (SDPhantom) or send a DM.