Combined transform calls in KSketch.

There is now only one set of transform functions, instead of 3. Updated
Interactors to work with the changes too.
Reworked transition workflow's begin and update procedures.

Transition is not yet complete. Transition End has not been reworked.

Optimised view updates during transition by reducing event dispatching.

Model modification/ normalisation is will be postponed till the end of
the operation.
Reimplemented model modification workflow at the end of a transition

Transitions will now only insert additional keys and perform overwrites
to an object's timeline after they end. Performing modification at the
end of transitions feels more secure since the transform interface will
have a better idea of how much to overwrite and what to not touch.