Fixed unsaving user_name parameter

source/ubinstall-gtk.c

@@ -1108,6 +1108,7 @@ void *on_setup_system_configuration(void * data){
     if (widgets){};
     int size;
     config_str all_parameters = yon_config_get_selection_by_key(&size,
+    user_name_parameter,
     user_gecos_parameter,
     user_password_parameter,
     root_password_parameter,
@@ -1144,6 +1145,7 @@ void *on_save_system_configuration(void * data){
     if (widgets){};
     int size;
     config_str all_parameters = yon_config_get_selection_by_key(&size,
+    user_name_parameter,
     user_gecos_parameter,
     user_password_parameter,
     root_password_parameter,