Linked path attachments for skins

Currently, it is possible to place path attachments in skin placeholders and switch paths for each skin, but even if you want to use the same path for some skins and different paths for only some skins, all path attachments will be not linked, and making it tedious to apply the same modification to each path, e.g. when you want to modify the weights or deform them in animations. Therefore, adding the feature to create "linked path attachments" as well as mesh attachments would make path attachments more manageable.

This is requested in the following forum post:
http://esotericsoftware.com/forum/Linked-Paths-vs-Path-Constraints-Skins-17767