cosmetic: display alert before armbian-config desktop install

Author: igorpecovnik

lib/functions/rootfs/distro-agnostic.sh

@@ -424,6 +424,8 @@ function install_distribution_agnostic() {
 		# start/autologin) — no real user exists at image-build time;
 		# armbian-firstrun creates the first user on first boot.
 		# See armbian/configng#859.
+		display_alert "Installing desktop via armbian-config" "${DESKTOP_ENVIRONMENT} tier=${DESKTOP_TIER:-mid}" "info"
+
 		# SUDO_USER= unset: host's SUDO_USER leaks into the chroot
 		# via chroot_sdcard. module_desktop_getuser tries `id $SUDO_USER`
 		# which fails noisily because the host user doesn't exist in the