To be able to support behavior where VisualEditor (or potentially any other tool) turns on and immediately turns WWT *off* (and potentially disables it while it's operational) we need to make sure that the system allows for a clear action that loads, unloads, and disables the WWT system.

Right now a lot of those actions are done from within the different widgets, and is hard to unify externally (an external system will need to know to call the info bar widget + replace the DOM + manage the side link, etc.) This is making managing the system's state (enabling/launching/dismissing) through external code practically impossible. This ticket aims to create this method by creating a model/controller approach.

Acceptance criteria (and test):

• Have a clear functional method to launch and dismiss WWT