Major Fix for Bone cleaning / Custom Avatar Binding

Features

• Added ability to connect/deconnect selected bones to their parents
• Removed Anim Graph, as it does not exist inthe FST Reader

Bug Fixes

• UUID generated by FST now actually gets generated by time, instead of just by filename, allowing for better cache busting
• Axises are now correctly updated for Custom Avatar Bones
• Refined Custom Bone automatic detection: Now includes better finger detection
• Refined Bone Name Cleaning feature to be much more Robust
• Nuke Mixamo prefixes on Any bone button press.
• Test Pose now Makes sure the pose mode is set to pose instead of rest