Fixed Timezone page utc on zone

source/ubinstall-gtk-region.c

@@ -31,7 +31,13 @@ void on_region_changed(GtkComboBox *self, main_window *widgets){
     if (!yon_char_is_empty(active)){
         config_str parsed = yon_timezone_get_zones_from_region(active,&size);
         for (size_t i=0;i<size;i++){
-            gtk_combo_box_text_append(GTK_COMBO_BOX_TEXT(widgets->ZoneCombo),parsed[i],_(parsed[i]));
+            char *timezone = yon_char_unite(active,"/",parsed[i],NULL);
+            char *utc = yon_timezone_get_utc(timezone);
+            if (utc&&strlen(utc)>3) utc[3]='\0';
+            char *zone_label = yon_char_unite("(UTC ",utc,") ",_(parsed[i]),NULL);
+            gtk_combo_box_text_append(GTK_COMBO_BOX_TEXT(widgets->ZoneCombo),parsed[i],zone_label);
+            free(zone_label);
+            free(timezone);
         }
         if (size) yon_char_parsed_free(parsed,size);
         gtk_combo_box_set_active(GTK_COMBO_BOX(widgets->ZoneCombo),0);