Integrate Viewer API to UserMenu

[kevinhughes27]

part of #750

The UserMenu component is currently hard coded. After #829 is completed this component should use real data. It will need to be wrapped in a QueryProvider and unfortunately I am pretty sure there is no way to integrate this with the QueryProvider for the route component meaning the initial page load will require 2 API requests. We should make this provider higher up for the entire Admin component (side nav, top nav etc) that way we can add other fragments eventually (like notifications etc).

Task:

• Update UserMenu to use real data from the Viewer API
• Add a QueryProvider for the admin component so other fragments can be added

@hiteshkanwar

[kevinhughes27]

@hiteshkanwar