Replace resource identifier in PageRenderer asset registration

Author: chrrynobaka

Resources/Private/Partials/Module/JsAndCssImport.html

@@ -1,6 +1,6 @@
 <f:be.pageRenderer
     includeCssFiles="{
-        0: '{f:uri.resource(path:\'Css/Backend.css\')}'
+        0: 'EXT:powermail/Resources/Public/Css/Backend.css'
     }"
     includeRequireJsModules="{
         0: 'TYPO3/CMS/Powermail/Powermail/Backend.min'