no issue
- if only some roles have been loaded, such as from embedded user records in posts, navigating to the Staff screen when invites exist for roles that have not yet been loaded would result in an Ember Data error
- the error occurs because we use `invite.role.*` in the template but we've specified `{async: false}` in the `belongsTo` relationship for `invite.role` which prevents Ember Data automatically querying the API
- by always fetching the roles list before fetching the invites list we prevent the error but we do introduce an extra API request in some circumstances
refs. [d6c22df](d6c22df6d7)
- added icons for members and pages
- improved view site link visibility
- added view site to logo dropdown
- updated all navigation and logo menu icons
- rename 'team' to 'staff'
- lots of design refinement and update (colors, shadows)
