As the not-plasma feature is used from the panel, switch plasma-nm to master

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2844 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Install icons again

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2845 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9