Merge branch 'ee-dispatcher-dashboard-activities' into 'master'

Refactor dashboard activities path (EE Version)

See merge request gitlab-org/gitlab-ee!4002

app/assets/javascripts/dispatcher.js

@@ -375,7 +375,9 @@ import initLDAPGroupsSelect from 'ee/ldap_groups_select'; // eslint-disable-line
           shortcut_handler = new ShortcutsIssuable(true);
           break;
         case 'dashboard:activity':
-          new Activities();
+          import('./pages/dashboard/activity')
+            .then(callDefault)
+            .catch(fail);
           break;
         case 'projects:commit:show':
           new Diff();

app/assets/javascripts/pages/dashboard/activity/index.js

+import Activities from '~/activities';
+
+export default () => new Activities();