Fix reordering color swatches in color picker is not saved

scene/gui/color_picker.cpp

@@ -839,6 +839,55 @@ void ColorPicker::_drop_data_fw(const Point2 &p_point, const Variant &p_data, Co
  if (preset_from_id == hover_now || hover_now == -1) {
  return;
  }
+
+ {
+ List<Color>::Element *from = presets.front();
+ List<Color>::Element *to = presets.front();
+ {
+ int c = 0;
+ while (c < preset_from_id - 1) {
+ from = from->next();
+ c++;
+ }
+ }
+ {
+ int c = 0;
+ while (c < hover_now - 1) {
+ to = to->next();
+ c++;
+ }
+ }
+ if (hover_now == presets.size()) {
+ presets.move_to_back(from);
+ } else {
+ presets.move_before(from, to->next());
+ }
+ }
+
+ {
+ List<Color>::Element *from = preset_cache.front();
+ List<Color>::Element *to = preset_cache.front();
+ {
+ int c = 0;
+ while (c < preset_from_id - 1) {
+ from = from->next();
+ c++;
+ }
+ }
+ {
+ int c = 0;
+ while (c < hover_now - 1) {
+ to = to->next();
+ c++;
+ }
+ }
+ if (hover_now == presets.size()) {
+ preset_cache.move_to_back(from);
+ } else {
+ preset_cache.move_before(from, to->next());
+ }
+ }
+
  preset_container->move_child(preset_container->get_child(preset_from_id), hover_now);
  }
 }