Only apply custom CSS and header HTML on forum, not admin

src/Forum/WebApp.php

@@ -51,6 +51,10 @@ class WebApp extends AbstractWebApp
             return $this->formatter->getJs();
         });
 
+        $view->getCss()->addString(function () {
+            return $this->settings->get('custom_less');
+        });
+
         return $view;
     }
 

src/Http/WebApp/AbstractWebApp.php

@@ -131,10 +131,6 @@ abstract class AbstractWebApp
 
         $css->addString($lessVariables);
         $localeCss->addString($lessVariables);
-
-        $css->addString(function () {
-            return $this->settings->get('custom_less');
-        });
     }
 
     /**

views/admin.blade.php

@@ -1,5 +1,3 @@
-{!! array_get($forum, 'attributes.headerHtml') !!}
-
 <div id="app" class="App">
 
   <div id="app-navigation" class="App-navigation"></div>