Help text appears below FilteredSelectMultiple's select controls

[Jacob Walls]

There is ​code in SelectFilter2.js that appears to reposition a help text for a FilteredSelectMultiple above the controls, but it doesn't work for two reasons:

• it searches for a help text in a <p> tag, but it became a <div> in #27207
• to find the wanted help text today, it now would need to start its search two parents higher (#34383 looks relevant, but I didn't verify if already an issue before that)

In other words, if we want this code to work, it would need to be like:

django/contrib/admin/static/admin/js/SelectFilter2.js

@@ -18 +18 @@
             from_box.setAttribute('aria-labelledby', field_id + '_from_label');
             from_box.setAttribute('aria-describedby', `${field_id}_helptext ${field_id}_choose_helptext`);
 
-            for (const p of from_box.parentNode.getElementsByTagName('p')) {
-                if (p.classList.contains("info")) {
-                    // Remove <p class="info">, because it just gets in the way.
-                    from_box.parentNode.removeChild(p);
-                } else if (p.classList.contains("help")) {
+            const parentOfFlexContainer = from_box.parentNode.parentElement.parentElement;
+            for (const div of parentOfFlexContainer.getElementsByTagName('div')) {
+                if (div.classList.contains("info")) {
+                    // Remove <div class="info">, because it just gets in the way.
+                    parentOfFlexContainer.removeChild(div);
+                } else if (div.classList.contains('help')) {
                     // Move help text up to the top so it isn't below the select
                     // boxes or wrapped off on the side to the right of the add
                     // button:
-                    from_box.parentNode.insertBefore(p, from_box.parentNode.firstChild);
+                    parentOfFlexContainer.insertBefore(div, parentOfFlexContainer.firstChild);
                 }
             }

In order to have:
.

Rather than:
.

To reproduce, just visit the admin, edit a user, view the permissions select widget, observe placement of the help text.