Previously: When a bone in the update cache is updated, the local transform is used. This causes any applied transform to be lost, losing the pose from any previously applied constraints.
After this commit: Before processing the update cache, first all bones applied transform is set to the local transform. Next, when a bone in the update cache is updated, the applied transform is used. This keeps the pose from any previously applied constraints. Additionally, instead of using the `appliedValid` flag, the applied transform is always updated after making changes to the world transform.
Forum discussion:
http://esotericsoftware.com/forum/Editor-Parent-constraint-order-breaks-child-constraints-15774?p=69494#p69494
