don't crash on 'None/DIY' selection from jade gui

src/args.rs

@@ -220,4 +220,7 @@ pub enum DesktopSetup {
 
     #[clap(name = "enlightenment")]
     Enlightenment,
+
+    #[clap(name = "None/DIY")]
+    None,
 }

src/functions/desktops.rs

@@ -13,6 +13,8 @@ pub fn install_desktop_setup(desktop_setup: DesktopSetup) {
         DesktopSetup::Mate => install_mate(),
         DesktopSetup::Xfce => install_xfce(),
         DesktopSetup::Enlightenment => install_enlightenment(),
+        DesktopSetup::None => log::debug!("No desktop setup selected"),
+        _ => crash("Unsupported desktop setup", 1),
     }
     install_networkmanager();
 }