config-desktop: link to Developer-Guide_Desktops docs in DE/tier dialogs

Surfaces the canonical reference for what each desktop environment and
tier ships in the dialog text so the operator can read the details
without leaving the build wizard.

Author: igorpecovnik

lib/functions/configuration/config-desktop.sh

@@ -120,7 +120,7 @@ for de in json.load(sys.stdin):
 		fi
 
 		dialog_menu "Choose a desktop environment" "$backtitle" \
-			"Select the default desktop environment to bundle with this image" \
+			"Select the default desktop environment to bundle with this image.\nDocs: https://docs.armbian.com/Developer-Guide_Desktops/" \
 			"${options[@]}"
 		set_interactive_config_value DESKTOP_ENVIRONMENT "${DIALOG_MENU_RESULT}"
 
@@ -152,7 +152,7 @@ for de in json.load(sys.stdin):
 			"full" "Office, creative, dev tools (~2.5 GB)"
 		)
 		dialog_menu "Choose desktop tier" "$backtitle" \
-			"Select which package set to install with this desktop.\nTiers can be upgraded or downgraded at any time\nusing armbian-config on the running system." \
+			"Select which package set to install with this desktop.\nTiers can be upgraded or downgraded at any time\nusing armbian-config on the running system.\nDocs: https://docs.armbian.com/Developer-Guide_Desktops/" \
 			"${options[@]}"
 		set_interactive_config_value DESKTOP_TIER "${DIALOG_MENU_RESULT}"