xfce4-mixer: Set pulseaudio as default device.

xfce-settings/etcskel/.config/xfce4/panel/xfce4-mixer-plugin-12695164530.rc

-card=HDAATISBAlsamixer
-track=Общий
-command=xfce4-mixer
-

xfce-settings/etcskel/.config/xfce4/panel/xfce4-mixer-plugin-15.rc

+card=PlaybackPulseAudioMixer
+track=Master
+command=xfce4-mixer

xfce-settings/etcskel/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-mixer.xml

 <?xml version="1.0" encoding="UTF-8"?>
 
 <channel name="xfce4-mixer" version="1.0">
-  <property name="sound-card" type="string" value="HDAATISBAlsamixer"/>
+  <property name="sound-card" type="string" value="PlaybackPulseAudioMixer"/>
   <property name="window-height" type="int" value="400"/>
   <property name="window-width" type="int" value="600"/>
   <property name="sound-cards" type="empty">
-    <property name="HDAATISBAlsamixer" type="array">
-      <value type="string" value="Общий"/>
-      <value type="string" value="PCM"/>
-      <value type="string" value="Микрофон"/>
+    <property name="PlaybackPulseAudioMixer" type="array">
+      <value type="string" value="Master"/>
     </property>
   </property>
+  <property name="active-card" type="string" value="PlaybackPulseAudioMixer"/>
+  <property name="volume-step-size" type="uint" value="5"/>
 </channel>