Add minimum specs

spec/dummy/app/assets/stylesheets/active_admin.scss

@@ -8,8 +8,10 @@
 // $sidebar-width: 242px;
 
 // Active Admin's got SASS!
-@import "active_admin/mixins";
-@import "active_admin/base";
+@import 'active_admin/mixins';
+@import 'active_admin/base';
+
+@import 'activeadmin/quill_editor_input';
 
 // Overriding any non-variable SASS must be done after the fact.
 // For example, to change the default status-tag color: