[BUGFIX] Fix BE module controll buttons

Resources/Public/JavaScript/Backend.js

@@ -144,5 +144,17 @@ define([
 
 	SgMail.init();
 
+	if (typeof window.jumpExt === 'undefined') {
+		window.jumpExt = SgMail.jumpExt;
+	}
+
+	if (typeof window.jumpSelf === 'undefined') {
+		window.jumpSelf = SgMail.jumpSelf;
+	}
+
+	if (typeof window.jumpToUrl === 'undefined') {
+		window.jumpToUrl = SgMail.jumpToUrl;
+	}
+
 	return SgMail;
 });