Enable support for changing stable / nightly

armbian-config main=System selection=Nightly
Signed-off-by: Igor Pecovnik <igor.pecovnik@gmail.com>

debian-config-jobs

@@ -1409,11 +1409,12 @@ unset selection
 	"Nightly" )
 
 		if ! is_package_manager_running; then
+			[[ -z $scripted ]] &&
 			dialog --colors --title " \Z1Warning\Z0 " --backtitle "$BACKTITLE" --yes-label "Yes" \
 			--no-label "No" --yesno \
 			"\nYou are switching to an untested auto-build repository which might break your system.\n\nContinue?" 10 48
 
-			if [[ $? = 0 ]]; then
+			if [[ $? = 0 || -n $scripted ]]; then
 				sed -i 's/^deb http:\/\/[^ ]*/deb http:\/\/beta.armbian.com/' /etc/apt/sources.list.d/armbian.list
 				reload_bsp
 			fi
@@ -1426,11 +1427,12 @@ unset selection
 	"Stable" )
 
 		if ! is_package_manager_running; then
+			[[ -z $scripted ]] &&
 			dialog --colors --title " \Z1Warning\Z0 " --backtitle "$BACKTITLE" --yes-label "Yes" \
 			--no-label "No" --yesno \
 			"\nYou are switching to a stable repository where you will receive future updates.\n\nContinue?" 9 44
 
-			if [[ $? = 0 ]]; then
+			if [[ $? = 0 || -n $scripted ]]; then
 				sed -i 's/^deb http:\/\/beta/deb http:\/\/apt/' /etc/apt/sources.list.d/armbian.list
 				reload_bsp
 			fi