Update uuid.html.twig

Templates/Pages/tune/uuid.html.twig

@@ -49,6 +49,7 @@
                         <h2>{{ "Audio"|translate }}</h2>
                         <pre id="MIDI--{{ TuneDetails.ID }}"></pre>
                         <button onclick="MIDIjs.play('/API/V1/GetMIDIFile.php?tune-id={{ TuneDetails.ID }}');">{{ "Play"|translate }}</button>
+                        <button onclick="MIDIjs.stop();">{{ "Stop"|translate }}</button>
                     </div>
 
                     <div class="ThreeDContainer">