How do I make custom .desktop files behave correctly in the Gnome 3 sidebar?

I've installed TeamSpeak 3 to $HOME/Applications and I've created a custom desktop file: [Desktop Entry] Name=TeamSpeak 3 Comment=VOIP Client Path=/home/tomas/Applications/TeamSpeak3-Client-linux_amd64 Exec=bash ts3client_runscript.sh Icon=/home/tomas/Pictures/icons/teamspeak-3-icon.png Terminal=false Type=Application This shows up perfectly in Gnome 3 and I can pin the application to my sidebar: However, when I click the icon to launch TeamSpeak, the launched application spawns a new icon rather than being bound to the icon I pressed: Why does this happen? What mechanism does Gnome 3 use to decide which running applications are bound to which sidebar icons? Is there anything I can do to make this work? My first guess was that it's because the actual application isn't launched directly, but through a bash script. I tried adding exec to the runscript to make the application be the direct child of the launcher, but it didn't make a difference.