Spiked out the controls for adding

Section.grammars()
Specification.grammars()
Pushing thru much more on StepAdder
add-step can fire a new-step event

UT’s don’t work, but seems to be just the test harness
Adding a step to a fixture works!
Step, Specification, Section.isHolder()
Can build the Specification outline model
Step.clearActiveState()
Specification.findByPath()
Got Specification.selectCell mechanics
Fixed the busted client tests. Note to self, run the build before committing
Specification.selectHolder mechanics
EditorPresenter is delegating to Specification for all the what's active state machine stuff
Boom! Switching between sections in the editor works