DOMNodeInserted mutation event deprecation/removal

[Davi Frossard]

horizon version 18.6.2-5+deb11u2

The following error appears in the browser's console when using openstack_dashboard with starlingx_dashboard (GUI):

[Deprecation] Listener added for a 'DOMNodeInserted' mutation event. Support for this event type has been removed, and this event will no longer be fired. See https://chromestatus.com/feature/5083947249172480 for more information.
add @ output.a1bb1b7d39a3.js:311
jQuery.event.add @ output.a1bb1b7d39a3.js:733
(anonymous) @ output.a1bb1b7d39a3.js:304
each @ output.a1bb1b7d39a3.js:27
each @ output.a1bb1b7d39a3.js:15
on @ output.a1bb1b7d39a3.js:304
on @ output.a1bb1b7d39a3.js:373
horizon.forms.init_new_selects @ output.5fea6955f495.js:54
horizon.addInitFunction.horizon.forms.init @ output.5fea6955f495.js:54
Horizon.horizon.init @ output.a1bb1b7d39a3.js:7318
fire @ output.a1bb1b7d39a3.js:210
fireWith @ output.a1bb1b7d39a3.js:216
ready @ output.a1bb1b7d39a3.js:223
completed @ output.a1bb1b7d39a3.js:224