Update containers to use grid layout by default and ensure autoscreens use new layout prop

packages/builder/src/templates/Screen.js

@@ -18,6 +18,7 @@ export class Screen extends BaseStructure {
         },
         _children: [],
         _instanceName: "",
+        layout: "flex",
         direction: "column",
         hAlign: "stretch",
         vAlign: "top",

packages/builder/src/templates/gridDetailsScreen.js

@@ -40,6 +40,7 @@ const createScreen = (tableOrView, permissions) => {
   const gridHeader = new Component("@budibase/standard-components/container")
     .instanceName("Heading container")
     .customProps({
+      layout: "flex",
       direction: "row",
       hAlign: "stretch",
     })

packages/client/manifest.json

@@ -194,7 +194,7 @@
             "barTitle": "Grid layout"
           }
         ],
-        "defaultValue": "flex"
+        "defaultValue": "grid"
       },
       {
         "type": "select",