Added default ntp server output when switch to 'default' at ntp combo box

source/ubl-settings-datetime.c

@@ -284,15 +284,21 @@ void on_ntp_sync(GtkWidget *, main_window *widgets){
     switch(mode){
         case 0:
             gtk_widget_set_sensitive(widgets->NTPEntry,0);
+            if (main_config.ntp_default){
+                gtk_entry_set_text(GTK_ENTRY(widgets->NTPEntry),main_config.ntp_default);
+            }
             break;
         case 1:
             gtk_widget_set_sensitive(widgets->NTPEntry,0);
+                gtk_entry_set_text(GTK_ENTRY(widgets->NTPEntry),"");
             break;
         case 2:
             gtk_widget_set_sensitive(widgets->NTPEntry,0);
+                gtk_entry_set_text(GTK_ENTRY(widgets->NTPEntry),"");
             break;
         case 3:
             gtk_widget_set_sensitive(widgets->NTPEntry,1);
+                gtk_entry_set_text(GTK_ENTRY(widgets->NTPEntry),"");
             break;
     }
 }
@@ -346,6 +352,17 @@ void config_init(){
     main_config.lock_save_global=0; 
     main_config.lock_save_local=0; 
     main_config.load_mode=1;
+    main_config.ntp_default = NULL;
+
+    char *ntp_command = yon_config_parameter_prepare_command(NTPSERVERS_parameter_command,"default",NULL,NULL);
+    int size;
+    config_str parsed = yon_config_load(ntp_command,&size);
+    if (size>0){
+        if (strcmp(parsed[0],"(null)\n")){
+            yon_char_remove_last_symbol(parsed[0],'\n');
+            main_config.ntp_default = parsed[0];
+        }
+    }
 }
 
 /**yon_main_window_complete(main_window *widgets) 

source/ubl-settings-datetime.h

@@ -59,6 +59,7 @@ char *local;
 typedef struct {
     template_config_fields
 
+    char *ntp_default;
 } config;
 
 typedef struct {