fix: setup issues + webpack improvements

client/graph/admin/navigation/navigation-mutation-save-tree.gql

@@ -0,0 +1,12 @@
+mutation ($tree: [NavigationItemInput]!) {
+  navigation{
+    updateTree(tree: $tree) {
+      responseResult {
+        succeeded
+        errorCode
+        slug
+        message
+      }
+    }
+  }
+}