first commit

Resources/Private/Layouts/Backend/WithPageTree.html

@@ -0,0 +1,10 @@
+<f:if condition="{can_not_proceed}">
+    <f:then>
+        <f:render partial="Backend/NoSiteAvailable" arguments="{_all}"/>
+    </f:then>
+    <f:else>
+
+        <f:render partial="Backend/FlashMessages" />
+        <f:render section="Main"/>
+    </f:else>
+</f:if>