Before AuraTrigger only supported a single spell id but now multiple
spells can activate the same trigger.
Related changes:
- Change the glue between AuraList and AuraTrigger to match this new functionality.
- Update the default frame config
This function is currently unused so these changes are not tested. The
Disable function now always hides the UnitFrame and calls
UnregisterUnitWatch with the correct parameters.
Due to a typo AuraTrigger:UpdateAura always received nil as its first
(before) parameter. This parameter is currently unused so it did not
trigger an error.