minor reduction in jQuery reliance in preferences.js

Author: Oaphi

app/assets/javascripts/preferences.js

@@ -1,4 +1,4 @@
-$(() => {
+document.addEventListener('DOMContentLoaded', () => {
   $('.js-user-pref').on('change', async (ev) => {
     const $tgt = $(ev.target);
     let value;
@@ -10,6 +10,7 @@ $(() => {
     }
     const prefName = $tgt.attr('data-pref');
     const community = $tgt.attr('data-community') === 'true';
+
     await QPixel.setPreference(prefName, value, community);
   });
 
@@ -25,4 +26,4 @@ $(() => {
       $(e).addClass('is-yellow');
     }
   });
-});
+});