Allow user to orbit in sketch mode

[franknoirot]

We have been locking the user's vantage while sketching, moving them to be normal to the sketch plane and disabling orbit. We do have camera syncing logic between client-side and engine-side though, so we could feasibly disable this locking. This would also unlock the ability for us to add a setting for the animation normal to the sketch plane, thereby allowing users to disable the setting and sketch without "having their head moved".

One limitation of our client/engine split at the moment is that any sketch geometry will render overtop of any engine-side geometry, but this could be justified as a stylistic choice and arguably is better for the relevant sketch geometry to be surfaced for the user above any distractions.