HiddenArtifactTracker

Changed how the Mage dungeon tint is tracked. I incorrectly interpreted the Blizzard PTR patch notes of "complete 10 dungeons" - they actually meant "complete 10 different dungeons" as now seen in live. The tracker will show completed dungeons in green, and incomplete in red (with no colour only incomplete dungeons are shown).

CAVEAT: This change is not retrospective, as such your tracking number wont be correct if you were using this addon during 7.3 as some dungeons not counted by Blizzard were counted by HAT, and there is no way of knowing which were, and which were not. As a result, I have reset the counter to zero, sorry!

Removed AK tracking for hidden skins, as it has been pointed out that this is now moot.

Fixed support for colour options on the mage tower.