Right now, in Test.tscn, the way that the "Nose" bone affects the waypoints is clearly not working the same way as how the "Face" bone affects its associated waypoints. There is still something wrong with the pose computation, either causing the waypoints to not rotate around the correct pivot point (which is what the rest of the problems so far have been), or perhaps something else.

While weight painting, especially with the buggy transform implementation, it is very natural to try to click on bones in the Scene tree to rotate them, and then to go right back and try to paint on some waypoints (especially with the "Always Show Points" option selected).

As such, this should simply be an option. Basically, the vector editing panel should just keep track of the last selected VecDrawing object, and whenever a bone is selected in the Scene panel, it should try to switch to that bone.

Moreover, whenever the Vector Editing panel is open, the editing mode for the vector object should simply be enabled. I don't think there's much reason to have the Vector Editing panel open when not editing an object, and if there eventually is a reason, it could be disabled with a flag.