From a8c36d8ba24eb95a238e35b786de09103c50138e Mon Sep 17 00:00:00 2001
From: Artur Arseniev <artur.catch@hotmail.it>
Date: Fri, 5 Jan 2018 13:10:23 +0100
Subject: [PATCH] Check if the sender exists in OpenStyleManager

---
 src/commands/view/OpenStyleManager.js | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/commands/view/OpenStyleManager.js b/src/commands/view/OpenStyleManager.js
index 2976e120f..aada8ef55 100644
--- a/src/commands/view/OpenStyleManager.js
+++ b/src/commands/view/OpenStyleManager.js
@@ -54,12 +54,13 @@ module.exports = {
    * @private
    */
   toggleSm() {
-      if(!this.sender.get('active'))
-        return;
-      if(this.target.get('selectedComponent')){
+      const sender = this.sender;
+      if (sender && sender.get && !sender.get('active')) return;
+
+      if (this.target.get('selectedComponent')) {
           this.$cn2.show();
           this.$header.hide();
-      }else{
+      } else {
           this.$cn2.hide();
           this.$header.show();
       }