maint(pat inject): Modernize code.

Author: thet

src/pat/inject/inject.js

@@ -960,7 +960,6 @@ const inject = {
         return $html;
     },
 
-    // XXX: hack
     _initAutoloadVisible($el, cfgs) {
         if ($el.data("pat-inject-autoloaded")) {
             // ignore executed autoloads
@@ -980,7 +979,7 @@ const inject = {
         };
         $el.click(trigger);
 
-        // Use case 1: a (heigh-constrained) scrollable parent
+        // Use case 1: a (height-constrained) scrollable parent
         if ($scrollable.length) {
             // if scrollable parent and visible -> trigger it
             // we only look at the closest scrollable parent, no nesting