erp5_web_manifest: add missing skin selection

bt5/erp5_web_manifest/RegisteredSkinSelectionTemplateItem/registered_skin_selection.xml

 <registered_skin_selection>
+ <skin_folder_selection>
+  <skin_folder>erp5_web_renderjs_ui</skin_folder>
+  <skin_selection>Manifest</skin_selection>
+ </skin_folder_selection>
  <skin_folder_selection>
   <skin_folder>manifest_renderjs_ui</skin_folder>
   <skin_selection>Manifest</skin_selection>

bt5/erp5_web_manifest/bt/template_registered_skin_selection_list

+erp5_web_renderjs_ui | Manifest
 manifest_renderjs_ui | Manifest
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