Update Desktop client launcher icon and command

Author: ataffanel

contentForVM/desktop/Crazyflie client.desktop

@@ -3,8 +3,8 @@ Version=1.0
 Type=Application
 Name=Crazyflie client
 Comment=
-Exec=python3 /home/bitcraze/projects/crazyflie-clients-python/bin/cfclient
-Icon=/home/bitcraze/Pictures/vm_client_logo.png
+Exec=python3 -m cfclient.gui
+Icon=/home/bitcraze/projects/crazyflie-clients-python/icon-256.icns
 Path=/home/bitcraze/projects/crazyflie-clients-python/
 Terminal=true
 StartupNotify=false