implement or create breadcrumb state container.

[lexjacobs]

Based on wireframe review we will be implementing a navigational breadcrumb on the client ui.
Research simple existing implementations or create one.
Initial thoughts are to store navigational hierarchy as a tree, and render breadcrumb as a representation of the existence of parents from any point in the tree.

[lexjacobs]

[lexjacobs]

Current thinking: the navigational state of the app is tracked via routeNameToIconClassHash in client/js/preload/setBaseTemplateListeners.js . Create a tree mapping that represents the breadcrumb state in this file.

And after route change, append breadcrumb.

Also clean up tail/routes.js in compliance and topology if not needed for current dynamic route generation machinery. Be aware of client/js/views/addonMenuView.js.