Page Content: Added form elements to filtering

Added and updated tests to cover.

Also updated API auth to a narrower focus of existing session instead of also existing user auth.
This is mainly for tests, to ensure they're following the session
process we'd see for activity in the UI.

app/Entities/Tools/EntityHtmlDescription.php

@@ -50,7 +50,7 @@ class EntityHtmlDescription
             return $html;
         }
 
-        return HtmlContentFilter::removeScriptsFromHtmlString($html);
+        return HtmlContentFilter::removeActiveContentFromHtmlString($html);
     }
 
     public function getPlain(): string

app/Entities/Tools/PageContent.php

@@ -318,7 +318,7 @@ class PageContent
         }
 
         if (!config('app.allow_content_scripts')) {
-            HtmlContentFilter::removeScriptsFromDocument($doc);
+            HtmlContentFilter::removeActiveContentFromDocument($doc);
         }
 
         return $doc->getBodyInnerHtml();