Simple Action Sets

Fixed an issue where applying a set didn't realise a macro with the same name as a spell was different
Added new system to get the base spellID from a morphed spell (eg. get Cone of Cold spellID from Dragon's Breath) to fix an random issue with those spells disappearing from bars.
Added morphedSpellID->baseSpellID cache.
Removed currentSet variable, as it doesn't make sense with dual specs anyway, updated minimap icon text to remove reference to it.

Garrison ability is using old system for morphed spells, so it could potentially disappear from bars, but only affects first instance of it.