Cancel sound file playback if audio alarm edit dialog is closed after clicking Try

Changelog

@@ -3,6 +3,7 @@ KAlarm Change Log
 === Version 3.4.0 (KDE Applications 22.04) --- 9 February 2022 ===
 * Allow calendars and date picker to be shown together in side panel [KDE Bug 440250]
 * Shrink calendar list to remove empty space when too large.
+* If audio alarm edit dialogue is closed after clicking Try, cancel sound file playback.
 
 === Version 3.3.6 (KDE Applications 21.12.3) --- 9 February 2022 ===
 * Fix failure to create a missing calendar file after enabling a resource.

src/editdlgtypes.cpp

 /*
  *  editdlgtypes.cpp  -  dialogs to create or edit alarm or alarm template types
  *  Program:  kalarm
- *  SPDX-FileCopyrightText: 2001-2021 David Jarvie <djarvie@kde.org>
+ *  SPDX-FileCopyrightText: 2001-2022 David Jarvie <djarvie@kde.org>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
@@ -1593,6 +1593,12 @@ EditAudioAlarmDlg::EditAudioAlarmDlg(bool Template, const KAEvent& event, bool n
     connect(theApp(), &KAlarmApp::audioPlaying, this, &EditAudioAlarmDlg::slotAudioPlaying);
 }
 
+EditAudioAlarmDlg::~EditAudioAlarmDlg()
+{
+    if (mMessageWindow)
+        MessageDisplay::stopAudio();
+}
+
 /******************************************************************************
 * Return the window caption.
 */

src/editdlgtypes.h

 /*
  *  editdlgtypes.h  -  dialogues to create or edit alarm or alarm template types
  *  Program:  kalarm
- *  SPDX-FileCopyrightText: 2001-2021 David Jarvie <djarvie@kde.org>
+ *  SPDX-FileCopyrightText: 2001-2022 David Jarvie <djarvie@kde.org>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
@@ -259,6 +259,7 @@ public:
     explicit EditAudioAlarmDlg(bool Template, QWidget* parent = nullptr, GetResourceType = RES_PROMPT);
     EditAudioAlarmDlg(bool Template, const KAEvent&, bool newAlarm, QWidget* parent = nullptr,
                  GetResourceType = RES_PROMPT, bool readOnly = false);
+    ~EditAudioAlarmDlg() override;
 
     // Methods to initialise values in the New Alarm dialogue.
     // N.B. setTime() must be called first to set the date-only characteristic,