N°6765 Avoid behat scenario loading issues on portal modal (#569)

- New CombodoJsActivity API
- Replace existing calls in NiceWebPage (ready scripts)
- Add calls in ready block in portal object create template (used in both create and edit)

sources/application/WebPage/NiceWebPage.php

@@ -255,14 +255,14 @@ EOF
 	protected function GetReadyScriptsStartedTrigger(): ?string
 	{
 		return <<<JS
-$("body").attr("data-ready-scripts", "start");
+CombodoJsActivity.AddOngoingScript();
 JS;
 	}
 
 	protected function GetReadyScriptsFinishedTrigger(): ?string
 	{
 		return <<<JS
-$("body").attr("data-ready-scripts", "done");
+CombodoJsActivity.RemoveOngoingScript();
 JS;
 	}
 }