Fix one column layout of default newsletter structure

views/newsletter/editor.html

@@ -254,6 +254,23 @@
                 }
             },
             "blocks": [{
+              "orientation": "horizontal",
+              "type": "container",
+              "styles": {
+                  "block": {
+                    "backgroundColor": "transparent",
+                  },
+              },
+              "blocks": [{
+                "orientation": "vertical",
+                "type": "container",
+                "styles": {
+                  "block": {
+                    "backgroundColor": "transparent",
+                  },
+                },
+                "blocks": [
+                  {
                     "type": "header",
                     "text": "<p>Display problems? <a href=\"[viewInBrowserUrl]\">View it in your browser</a>.&nbsp;If I add a lot of text to test what happens... Well, nothing really (exciting) happens. Things don't break.</p>",
                     "styles": {
@@ -751,6 +768,9 @@
                               }
                           }]
                       }]
+                  }
+                ],
+              }],
             }, {
                 "orientation": "horizontal",
                 "type": "container",