Print install summary to file and setup log after user confirms

setup/so-whiptail

@@ -607,6 +607,9 @@ whiptail_end_settings() {
 
 	local exitstatus=$?
 	whiptail_check_exitstatus $exitstatus
+
+	echo "$end_msg" > /root/install_summary
+	printf '%s\n' 'Install summary:' "$end_msg" >> "$setup_log"
 }
 
 __append_end_msg() {