Change select2 to 4.0.13 and fix autofocus. Other minor cosmetic fix

public/plugin/select2/fix-autofocus.js

@@ -0,0 +1,8 @@
+$(document).on('select2:open',(event) => {
+  const searchField = document.querySelector(
+    `.select2-search__field[aria-controls="select2-${event.target.getAttribute('data-select2-id')}-results"]`,
+  );
+  if (searchField) {
+     searchField.focus();
+  }
+});