Remove Locking

Locking in VPX is a valuable feature because it's hard to identify shit in the editor and locking stuff you've finished working on can be accelerate your workflow. However, [Unity already provides tools for that](https://docs.unity3d.com/6000.0/Documentation/Manual/ScenePickingControls.html), and it's in general less confusing to select stuff due to Unity's 3D editor.

So, let's get rid of all the locking data. We can keep it in the data classes because they are closely modeled after the VPX file format, but let's keep them out of VPE.