Refactor to use _.isUndefined

Author: Nazar65

lib/web/mage/adminhtml/browser.js

@@ -62,8 +62,7 @@ define([
                 this.modal.modal('openModal');
 
                 return;
-            } else if (typeof options === 'undefined' 
-                       && self.modalLoaded === true) {
+            } else if (_.isUndefined(options) && self.modalLoaded === true) {
                       this.modal.modal('openModal');
                       return;
             }