show only one option in bg music source

Output/Themes/Ambient/Screens/ScreenOptionsSound.xml

@@ -385,13 +385,13 @@
       <!--<TextH>: Text height-->
       <TextH>32,00</TextH>
       <!--<TextMaxW>: Maximum text width (if exists)-->
-      <TextMaxW>205,33</TextMaxW>
+      <TextMaxW>500</TextMaxW>
       <!--<TextFont>: Text font name-->
       <TextFont>Normal</TextFont>
       <!--<TextStyle>: Text style: Normal, Italic, Bold, BoldItalic-->
       <TextStyle>Bold</TextStyle>
       <!--<NumVisible>: Number of visible elements in the slide-->
-      <NumVisible>3</NumVisible>
+      <NumVisible>1</NumVisible>
     </SelectSlideBackgroundMusicSource>
   </ScreenOptionsSound>
 </root>