gw-advanced-merge-tags.php: Added :selected modifier to target selected multi select choice by index on the Advanced Merge Tags snippet.

Author: saifsultanc

gravity-forms/gw-advanced-merge-tags.php

@@ -493,8 +493,8 @@ public function handle_field_modifiers( $value, $input_id, $modifier, $field, $r
 					$default_countries = array_flip( GF_Fields::get( 'address' )->get_default_countries() );
 					return rgar( $default_countries, $value );
 				case 'selected':
-					// 'selected' can be used over 'Checkbox' field to target the selected checkbox by its zero-based index.
-					if ( $field->type == 'checkbox' ) {
+					// 'selected' can be used over 'Checkbox' or 'Multi Select' field to target the selected checkbox/multiselect choice by its zero-based index.
+					if ( $field->type == 'checkbox' || $field->type == 'multiselect' ) {
 						$index = $modifier_options;
 						if ( $index !== 'selected' && is_numeric( $index ) ) {
 							$index = intval( $index );