[fix] Don't modify hosts file during whiptail menus

setup/so-functions

@@ -103,9 +103,13 @@ add_manager_hostfile() {
 
 	local exitstatus=$?
 	whiptail_check_exitstatus $exitstatus
+}
 
-	# Add manager to hosts file
-	echo "$MSRVIP   $MSRV" >> /etc/hosts
+
+add_mngr_ip_to_hosts() {
+	if [[ -n "$MSRVIP" ]]; then
+		echo "$MSRVIP   $MSRV" >> /etc/hosts
+	fi
 }
 
 addtotab_generate_templates() {