Item in context safety check

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

@@ -164,11 +164,13 @@ class ComponentManager {
       for(let observer of observers) {
         if(handler.contextRequestHandler) {
           var itemInContext = handler.contextRequestHandler(observer.component);
+          if(itemInContext) {
             this.sendContextItemInReply(observer.component, itemInContext, observer.originalMessage);
           }
         }
       }
     }
+  }
 
   jsonForItem(item, component, source) {
     var params = {uuid: item.uuid, content_type: item.content_type, created_at: item.created_at, updated_at: item.updated_at, deleted: item.deleted};