Make Cala show up as loading even before the mainwindow pops up.

calamares.desktop

@@ -8,5 +8,5 @@ Exec=pkexec /usr/bin/calamares
 Comment=Calamares — System Installer
 Icon=calamares
 Terminal=false
-StartupNotify=false
+StartupNotify=true
 Categories=Qt;System;