From: Toby Smithe  <tsmithe@ubuntu.com>
Subject: Fix startup notification bug owing to use of wrapper script.

--- a/mscore/packaging/mscore.desktop
+++ b/mscore/packaging/mscore.desktop
@@ -8,6 +8,7 @@
 Icon=mscore
 Name=MuseScore
 StartupNotify=true
+StartupWMClass=mscore.real
 Terminal=false
 Type=Application
 Categories=Qt;Audio;Sequencer;Midi;AudioVideoEditing;Music;AudioVideo;