D11166: Simplify display when there's only a single device

[Nathaniel Graham]

ngraham added a comment.


  Thanks for all your help!

REPOSITORY
  R115 Plasma Audio Volume Applet

REVISION DETAIL
  https://phabricator.kde.org/D11166

To: ngraham, #plasma, drosca
Cc: Zren, plasma-devel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, 
abetts, sebas, apol, mart