James D. Callahan III:
	- Added a "hints" sub-tooltip, accessible by mousing over the symbol at the bottom-right corner.
	- Added Alt-Left-Click to invite to party.
	- If an in-game friend also happens to be a RealID friend, merge the data instead of adding a second entry.
	- Changed ColorPlayerLevel() to use GetRelativeDifficultyColor() since that's more of a WoW standard for gauging levels at a glance. Minor cleanup.
