Transformation tracing

Cache update

OpenGL caches are being updated on SceneWindow resized, camera properties changed, objects being deleted.

Selection tool binding

Transform and Pen tools are bound to the selected objects so there's no need to drag and drop objects to the tool to bind them.
On selection change, the tools update their bind objects.

Transformation tracing

Tracing creates copies of an object when transforming an object via Transform tool.
Translation, rotation and scaling can be traced.