Migrate to shared alert in admin/groups/_form.html

app/views/admin/groups/_form.html.haml

@@ -27,12 +27,9 @@
   - if @group.new_record?
     .form-group.row
       .offset-sm-2.col-sm-10
-        .gl-alert.gl-alert-
-          .gl-alert-container
-            = sprite_icon('information-o', size: 16, css_class: 'gl-icon gl-alert-icon gl-alert-icon-no-title')
-            .gl-alert-content
-              .gl-alert-body
-                = render 'shared/group_tips'
+        = render 'shared/global_alert', dismissible: false do
+          .gl-alert-body
+            = render 'shared/group_tips'
     .form-actions
       = f.submit _('Create group'), class: "gl-button btn btn-confirm"
       = link_to  _('Cancel'), admin_groups_path, class: "gl-button btn btn-default btn-cancel"