Move EE differences for `app/assets/javascripts/pages/projects/issues/form.js`

The file app/assets/javascripts/pages/projects/issues/form.js has differences between CE and EE.

Diferences

diff --git a/home/yorickpeterse/Projects/gitlab/gdk-ce/gitlab/app/assets/javascripts/pages/projects/issues/form.js b/home/yorickpeterse/Projects/gitlab/gdk-ee/gitlab/app/assets/javascripts/pages/projects/issues/form.js
index f99023ad8e7..a2d8ae6d526 100644
--- a/home/yorickpeterse/Projects/gitlab/gdk-ce/gitlab/app/assets/javascripts/pages/projects/issues/form.js
+++ b/home/yorickpeterse/Projects/gitlab/gdk-ee/gitlab/app/assets/javascripts/pages/projects/issues/form.js
@@ -8,6 +8,7 @@ import MilestoneSelect from '~/milestone_select';
 import ShortcutsNavigation from '~/behaviors/shortcuts/shortcuts_navigation';
 import IssuableTemplateSelectors from '~/templates/issuable_template_selectors';
 import initSuggestions from '~/issuable_suggestions';
+import WeightSelect from 'ee/weight_select';
 
 export default () => {
   new ShortcutsNavigation();
@@ -20,4 +21,6 @@ export default () => {
   if (gon.features.graphql) {
     initSuggestions();
   }
+
+  new WeightSelect();
 };

What needs to be done

1. Safeguard with ifEE