Moved some scan_button setting/parenting code from addon:TRADE_SKILL_SHOW() to addon:OnInitialize() where the other half of it already was (and belongs). This ensures that the scan_button has a parent other than UIParent when addon:Scan() is called.

Moved some scan_button setting/parenting code from addon:TRADE_SKILL_SHOW() to addon:OnInitialize() where the other half of it already was (and belongs). This ensures that the scan_button has a parent other than UIParent when addon:Scan() is called.
Added coordinates for, and corrected the continent of, the following instances: "Ahn'kahet: The Old Kingdom", "Azjol-Nerub", "Halls of Lightning", "Halls of Stone", "The Oculus", "The Nexus", "The Violet Hold", "Utgarde Keep", and "Utgarde Pinnacle".