misc: add note about quixote3/id removal (#38095)

wcs/qommon/form.py

@@ -296,6 +296,7 @@ class Form(QuixoteForm):
         QuixoteForm.add(self, widget_class, name, *args, **kwargs)
         widget = self._names[name]
         if 'id' not in kwargs and 'id' in widget.attrs:
+            # don't let quixote3 assign a default id to widgets
             del widget.attrs['id']
         widget.advanced = advanced
         return widget