Use dynamic imports in dispatcher

app/assets/javascripts/dispatcher.js

@@ -76,37 +76,6 @@ var Dispatcher;
             .catch(fail);
           shortcut_handler = true;
           break;
-        case 'ci:lints:create':
-        case 'ci:lints:show':
-          import('./pages/ci/lints')
-            .then(callDefault)
-            .catch(fail);
-          break;
-        case 'admin:conversational_development_index:show':
-          import('./pages/admin/conversational_development_index/show')
-            .then(callDefault)
-            .catch(fail);
-          break;
-        case 'import:fogbugz:new_user_map':
-          import('./pages/import/fogbugz/new_user_map')
-            .then(callDefault)
-            .catch(fail);
-          break;
-        case 'profiles:personal_access_tokens:index':
-          import('./pages/profiles/personal_access_tokens')
-            .then(callDefault)
-            .catch(fail);
-          break;
-        case 'admin:impersonation_tokens:index':
-          import('./pages/admin/impersonation_tokens')
-            .then(callDefault)
-            .catch(fail);
-          break;
-        case 'dashboard:groups:index':
-          import('./pages/dashboard/groups/index')
-            .then(callDefault)
-            .catch(fail);
-          break;
       }
       switch (path[0]) {
         case 'admin':

app/assets/javascripts/pages/admin/conversational_development_index/show/index.js

-import UserCallout from '../../../../user_callout';
+import UserCallout from '~/user_callout';
 
-export default () => new UserCallout();
+document.addEventListener('DOMContentLoaded', () => new UserCallout());

app/assets/javascripts/pages/admin/impersonation_tokens/index.js

-import DueDateSelectors from '../../../due_date_select';
+import DueDateSelectors from '~/due_date_select';
 
-export default () => new DueDateSelectors();
+document.addEventListener('DOMContentLoaded', () => new DueDateSelectors());

app/assets/javascripts/pages/ci/lints/create/index.js

+import CILintEditor from '../ci_lint_editor';
+
+document.addEventListener('DOMContentLoaded', () => new CILintEditor());

app/assets/javascripts/pages/ci/lints/index.js

-import CILintEditor from './ci_lint_editor';
-
-export default () => new CILintEditor();

app/assets/javascripts/pages/ci/lints/show/index.js

+import CILintEditor from '../ci_lint_editor';
+
+document.addEventListener('DOMContentLoaded', () => new CILintEditor());

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

 import initGroupsList from '~/groups';
 
-export default initGroupsList;
+document.addEventListener('DOMContentLoaded', initGroupsList);

app/assets/javascripts/pages/import/fogbugz/new_user_map/index.js

-import UsersSelect from '../../../../users_select';
+import UsersSelect from '~/users_select';
 
-export default () => new UsersSelect();
+document.addEventListener('DOMContentLoaded', () => new UsersSelect());

app/assets/javascripts/pages/profiles/personal_access_tokens/index.js

-import DueDateSelectors from '../../../due_date_select';
+import DueDateSelectors from '~/due_date_select';
 
-export default () => new DueDateSelectors();
+document.addEventListener('DOMContentLoaded', () => new DueDateSelectors());