skel: session: don't autostart keepassxc by default

- when keepassxc starts before xfce4-panel notification area, the window will start minimized but the notification icon will be missing
- a workaround is to restart keepassxc
- bad UX, just disable keepassxc autostart
- use monochrome notification icon

config/includes.chroot/etc/skel/.config/autostart/org.keepassxc.KeePassXC.desktop

@@ -1,17 +1,2 @@
 [Desktop Entry]
-Name=KeePassXC
-GenericName=Password Manager
-GenericName[de]=Passwortverwaltung
-GenericName[es]=Gestor de contraseñas
-GenericName[fr]=Gestionnaire de mot de passe
-GenericName[ru]=менеджер паролей
-Comment=Community-driven port of the Windows application “KeePass Password Safe”
-Exec=keepassxc %f
-TryExec=keepassxc
-Icon=keepassxc
-StartupWMClass=keepassxc
-Terminal=false
-Type=Application
-Version=1.0
-Categories=Utility;Security;Qt;
-MimeType=application/x-keepass2;
+Hidden=True