fix error in Issue page - don't load CE issue sidebar bundle on EE page

app/assets/javascripts/pages/projects/issues/show.js

+import initIssuableSidebar from '~/init_issuable_sidebar';
+import Issue from '~/issue';
+import ShortcutsIssuable from '~/shortcuts_issuable';
+import ZenMode from '~/zen_mode';
+import '~/notes/index';
+import '~/issue_show/index';
+
+export default function () {
+  new Issue(); // eslint-disable-line no-new
+  new ShortcutsIssuable(); // eslint-disable-line no-new
+  new ZenMode(); // eslint-disable-line no-new
+  initIssuableSidebar();
+}

app/assets/javascripts/pages/projects/issues/show/index.js

-import initIssuableSidebar from '~/init_issuable_sidebar';
 import initSidebarBundle from '~/sidebar/sidebar_bundle';
-import Issue from '~/issue';
-import ShortcutsIssuable from '~/shortcuts_issuable';
-import ZenMode from '~/zen_mode';
-import '~/notes/index';
-import '~/issue_show/index';
+import initShow from '../show';
 
 document.addEventListener('DOMContentLoaded', () => {
-  new Issue(); // eslint-disable-line no-new
-  new ShortcutsIssuable(); // eslint-disable-line no-new
-  new ZenMode(); // eslint-disable-line no-new
-  initIssuableSidebar();
+  initShow();
   initSidebarBundle();
 });

ee/app/assets/javascripts/pages/projects/issues/show/index.js

-import '~/pages/projects/issues/show/index';
+import '~/pages/projects/issues/show';
 import initSidebarBundle from 'ee/sidebar/sidebar_bundle';
 
 document.addEventListener('DOMContentLoaded', initSidebarBundle);