🐛 Fix: wrong values were stored in the history

src/Dependencies/Ui.h

@@ -83,17 +83,25 @@ class Ui_Ref {
     template<typename T>
     void widget(const Cool::VariableId<T>& id, Cool::Variable<T>& variable)
     {
+        const auto prev_value    = variable.value;
+        const auto prev_metadata = variable.metadata;
         Cool::imgui(
             variable,
             {
                 .on_value_changed =
-                    [&]() { _command_executor.execute(
-                                Command_SetVariable<T>{.id = id, .value = variable.value}
+                    [&]() {
+                        const auto new_value = variable.value;
+                        variable.value       = prev_value; // To make sure the reversible command that will be created sees the correct previous value.
+                        _command_executor.execute(
+                                Command_SetVariable<T>{.id = id, .value = new_value}
                             ); },
 
                 .on_metadata_changed =
-                    [&]() { _command_executor.execute(
-                                Command_SetVariableMetadata<T>{.id = id, .metadata = variable.metadata}
+                    [&]() {
+                        const auto new_metadata = variable.metadata;
+                        variable.metadata       = prev_metadata; // To make sure the reversible command that will be created sees the correct previous value.
+                        _command_executor.execute(
+                                Command_SetVariableMetadata<T>{.id = id, .metadata = new_metadata}
                             ); },
 
                 .on_value_editing_finished =