Fixes

app/assets/javascripts/app/frontend/controllers/editor.js

@@ -28,10 +28,6 @@ angular.module('app.frontend')
     this.componentManager = componentManager;
     this.componentStack = [];
 
-    $rootScope.$on("theme-changed", function(){
-      this.postThemeToExternalEditor();
-    }.bind(this))
-
     $rootScope.$on("sync:taking-too-long", function(){
       this.syncTakingTooLong = true;
     }.bind(this));

app/assets/javascripts/app/services/componentManager.js

@@ -1,7 +1,7 @@
-class ComponentManager {
+/* This domain will be used to save context item client data */
+let ClientDataDomain = "org.standardnotes.sn.components";
 
-  /* This domain will be used to save context item client data */
-  let ClientDataDomain = "org.standardnotes.sn.components";
+class ComponentManager {
 
   constructor($rootScope, modelManager, syncManager, themeManager, $timeout, $compile) {
     this.$compile = $compile;
@@ -121,7 +121,7 @@ class ComponentManager {
   jsonForItem(item, component) {
     var params = {uuid: item.uuid, content_type: item.content_type, created_at: item.created_at, updated_at: item.updated_at, deleted: item.deleted};
     params.content = item.createContentJSONFromProperties();
-    params.clientData = item.getDomainDataItem(component.url, ClientDataDomain);
+    params.clientData = item.getDomainDataItem(component.url, ClientDataDomain) || {};
     this.removePrivatePropertiesFromResponseItems([params]);
     return params;
   }

app/assets/javascripts/app/services/migrationManager.js

@@ -48,7 +48,7 @@ class MigrationManager {
         }
 
         for(let editor of editors) {
-          editor.setItemToBeDeleted();
+          this.modelManager.setItemToBeDeleted(editor);
         }
 
         this.syncManager.sync();