Move session tracking

app/components/Analytics.js

@@ -17,6 +17,7 @@ export default class Analytics extends React.Component<*> {
     // $FlowIssue
     ga.l = +new Date();
     ga('create', process.env.GOOGLE_ANALYTICS_ID, 'auto');
+    ga('set', { dimension1: 'true' });
     ga('send', 'pageview');
 
     const script = document.createElement('script');

app/components/Auth.js

@@ -62,11 +62,6 @@ const Auth = observer(({ auth, children }: Props) => {
         };
       }
 
-      // Session custom dimension separates logged in from logged out users
-      if (window.ga) {
-        window.ga('set', { dimension1: true });
-      }
-
       authenticatedStores.collections.fetchPage({ limit: 100 });
     }