prevent loading both production and development CSS from the studio-frontend container

cms/templates/asset_index.html

@@ -13,8 +13,10 @@
 <%namespace name='static' file='static_content.html'/>
 
 <%block name="header_extras">
-    <link rel="stylesheet" type="text/css" href="${static.url('common/css/vendor/common.min.css')}" />
-    <link rel="stylesheet" type="text/css" href="${static.url('common/css/vendor/assets.min.css')}" />
+    % if not settings.STUDIO_FRONTEND_CONTAINER_URL:
+        <link rel="stylesheet" type="text/css" href="${static.url('common/css/vendor/common.min.css')}" />
+        <link rel="stylesheet" type="text/css" href="${static.url('common/css/vendor/assets.min.css')}" />
+    % endif
 </%block>
 
 <%block name="content">

cms/templates/container.html

@@ -35,8 +35,10 @@ from openedx.core.djangolib.markup import HTML, Text
 </script>
 <link rel="stylesheet" type="text/css" href="${static.url('js/vendor/timepicker/jquery.timepicker.css')}" />
 % if ENABLE_IN_CONTEXT_IMAGE_SELECTION.is_enabled(xblock_locator.course_key):
-  <link rel="stylesheet" type="text/css" href="${static.url('common/css/vendor/common.min.css')}" />
-  <link rel="stylesheet" type="text/css" href="${static.url('common/css/vendor/editImageModal.min.css')}" />
+    % if not settings.STUDIO_FRONTEND_CONTAINER_URL:
+        <link rel="stylesheet" type="text/css" href="${static.url('common/css/vendor/common.min.css')}" />
+        <link rel="stylesheet" type="text/css" href="${static.url('common/css/vendor/editImageModal.min.css')}" />
+    % endif
 % endif
 </%block>