Re-wrote addon:hexcolor() to use a table, with its values prepended by "|cff", instead of a large if-else chain.

Re-wrote addon:hexcolor() to use a table, with its values prepended by "|cff", instead of a large if-else chain.
In ttAdd(): Removed "|cff" since it's now automatically included in the color codes which are passed to it.
In GenerateTooltipContent() and MainPanel.scroll_frame:Update() - in the WORLD_DROP acquire type section - replaced colorizing by the acquire ID with colorizing by the recipe's quality. The acquire ID in this case was also the rarity, and should be replaced by something more useful. This also fixes an inconsistency between how the two functions handled the colorizing.