Marissa Nordahl from Google announced in a Google Business Help thread that they have updated the navigational elements within the Google My Business section.
Marissa said the new design will make it "easier to access the primary features, and more straightforward to access multiple locations if you use Google My Business Locations."
At the top of the page, you will see this breadcrumb and then toggle to manage where you currently are within the portal:
You can choose to display your Locations or Pages in a card view or a list view:
On an individual listing, you’ll also be able to more easily jump to "Edit Info", "Insights", "Reviews", and "Photos".
Linda Buquet said in the Local Search Forums "One really cool thing too is that it unifies everything into one dashboard now. So for big agencies you can see your single location clients AND your big chains AND listings you manage all in one central dashboard."
Forum discussion at Google Business Help and Local Search Forums.