Fixes #7684. Optional hide second button (cancel) in link/question alerts.

extension/Documentation/Manual.rst

@@ -5616,7 +5616,7 @@ Question
 +----------------------+--------------------------------------------------------------------------------------------------------------------------+
 | Positive button text | Default: 'Ok'                                                                                                            |
 +----------------------+--------------------------------------------------------------------------------------------------------------------------+
-| Negative button text | Default: 'Cancel'                                                                                                        |
+| Negative button text | Default: 'Cancel'. To hide the second button: '-'                                                                        |
 +----------------------+--------------------------------------------------------------------------------------------------------------------------+
 | Timeout in seconds   | 0: no timeout, >0: after the specified time in seconds, the alert will dissapear and behaves like 'negative answer'      |
 +----------------------+--------------------------------------------------------------------------------------------------------------------------+

extension/Source/core/report/Link.php

@@ -1094,14 +1094,16 @@ class Link {
         $level = ($arr[QUESTION_INDEX_LEVEL] === '') ? DEFAULT_QUESTION_LEVEL : $arr[QUESTION_INDEX_LEVEL];
         $ok = ($arr[QUESTION_INDEX_BUTTON_OK] === '') ? 'Ok' : $arr[QUESTION_INDEX_BUTTON_OK];
         $cancel = ($arr[QUESTION_INDEX_BUTTON_FALSE] === '') ? 'Cancel' : $arr[QUESTION_INDEX_BUTTON_FALSE];
+        $cancel = ($cancel=='-') ? '': ", { label: '$cancel',eventName: 'cancel'}";
+
         $timeout = ($arr[QUESTION_INDEX_TIMEOUT] === '') ? '0' : $arr[QUESTION_INDEX_TIMEOUT] * 1000;
         $flagModalStatus = ($arr[QUESTION_INDEX_FLAG_MODAL] === '') ? '1' : $arr[QUESTION_INDEX_FLAG_MODAL];
         $flagModal = ($flagModalStatus === "1") ? 'true' : 'false';
 
         $js = <<<EOF
 var alert = new QfqNS.Alert({ message: '$text', type: '$level', modal: $flagModal, timeout: $timeout, buttons: [
-    { label: '$ok', eventName: 'ok' },
-    { label: '$cancel',eventName: 'cancel'}
+    { label: '$ok', eventName: 'ok' }
+    $cancel
 ] } );
 alert.on('alert.ok', function() {
   window.location = $('#$id').attr('href');