Inspector doesn't get recreated when dispatching details.

Refactor inspector dispatching.

* Collapse local and service inspector methods into like render methods.
* Move logic regarding types of inspector to render methods.
Remove old 'inspector' method.
Merge pull request #422 from jaycee/dispatch-details

Charm details breakout panel is a dispatched view.

* renderUI can open the charmDetails viewlet.
* metadata.charm is used by state to signify if the details should be open.
* the service inspector can be dispatched to without creating a new inspector,
  so details can be viewed without resetting the inspector's state.
Unit details breakout pane is a dispatched view.