CE-1847: use common GlobalAppBar

• Replaces custom GlobalAppBar with nav menu using the common-ui component
• Replaces the user login/logout buttons (uses common context and components, and retains the redirect to /login when accessing unauthorized resources)
• does NOT add the "create ioc button" to the global app bar (tbd in CE-426)
• removes unused getUser method from user context
• ensures page and app title is set, adds a breadcrumb utility function

Closes CE-1847

src/views/IOC/IOCDetailsView.js

@@ -96,10 +96,11 @@ export function IOCDetailsView({ ioc, getIOC, loading }) {
   );
 
   const { setTitle } = useContext(GlobalAppBarContext);
-  useEffect(
-    () => ioc && setTitle(applicationTitle(`IOC Details: ${ioc.namingName}`)),
-    [ioc, setTitle]
-  );
+  useEffect(() => {
+    if (ioc) {
+      setTitle(applicationTitle(`IOC Details: ${ioc.namingName}`));
+    }
+  }, [ioc, setTitle]);
 
   const statusTab = (
     <Tab