Add identifier to messages sent to client iframe preview to avoid conflicts with embedded iframe events

packages/builder/src/components/design/AppPreview/CurrentItemPreview.svelte

@@ -68,6 +68,7 @@
     customTheme: $store.customTheme,
     previewDevice: $store.previewDevice,
     messagePassing: $store.clientFeatures.messagePassing,
+    isBudibaseEvent: true
   }
   $: json = JSON.stringify(previewData)
 

packages/builder/src/components/design/AppPreview/iframeTemplate.js

@@ -52,7 +52,7 @@ export default `
           console.error("Client received invalid JSON")
           // Ignore
         }
-        if (!parsed) {
+        if (!parsed || !parsed.isBudibaseEvent) {
           return
         }