EXT-1739 workaround, add "(old window)" button for legacy voice device settings so I can switch mic inputs.

indra/newview/skins/default/xui/en/panel_preferences_sound.xml

@@ -324,6 +324,19 @@
      name="device_settings_btn"
      top_pad="0"
      width="155" />
+  <!-- Until new panel is hooked up to code, we need to be able to get to
+    the old window to change input devices. James -->
+  <button
+    follows="left|top" 
+    label="(Old Window)"
+    name="legacy_device_window_btn"
+    left_delta="165"
+    bottom_delta="0"
+    height="20"
+    width="120"
+    commit_callback.function="Floater.Show"
+    commit_callback.parameter="pref_voicedevicesettings"    
+    />
     <panel
      visiblity_control="ShowDeviceSettings"
      border="false"