[IMP] website: define default template for scss files creation

addons/website/views/website_templates.xml

@@ -578,6 +578,13 @@
         }
     </style>
 </template>
+<template id="default_scss">
+    <style type="text/scss">
+        div#wrap div &gt; h1 {
+            color: $o-brand-primary;
+        }
+    </style>
+</template>
 <template id="default_csv">
     1,2,3
 </template>