gpadvs-dropdown-remove-button.js: Added Tom Select remove button plugin reference.

Author: veryspry

gp-advanced-select/gpadvs-dropdown-remove-button.js

@@ -4,12 +4,28 @@
  *
  * Adds a Remove button to selection options in Dropdown fields. By default,
  * the remove button is only added to Multi-Select fields.
+ * 
+ * The Remove Button is a built in plugin of Tom Select.
+ * @reference https://tom-select.js.org/plugins/remove-button/ 
  *
  * Instructions:
  *
  * 1. Install this snippet with our free Custom JavaScript plugin.
  *    https://gravitywiz.com/gravity-forms-code-chest/
  */
+
+function getNestedKey(obj, path) {
+    for (piece of path) {
+        if (!obj.hasOwnProperty(piece)) {
+            return undefined;
+        }
+
+        obj = obj[piece];
+    }
+
+    return obj;
+}
+
 window.gform.addFilter(
     'gpadvs_settings',
     function(settings, gpadvsInstance, selectNamespace) {