### Godot version

9f12e7b52d944

### System information

arch linux

### Issue description

Attempting to edit from the editor a typed array exported from a tool script fails, any value is immediately reset, setters are never called.

### Steps to reproduce

Create a script such as follows and try to add and then change items of the array in the inspector.


```gdscript
@tool
extends Node

@export var x: Array[String]
```

### Minimal reproduction project

n/a
if (p_property == "new_item_key") {
		object->set_new_item_key(p_value);
	} else if (p_property == "new_item_value") {
		object->set_new_item_value(p_value);
	} else if (p_property.begins_with("indices")) {
		int index = p_property.get_slice("/", 1).to_int();
		Dictionary dict = object->get_dict().duplicate();
		Variant key = dict.get_key_at_index(index);
		dict[key] = p_value;
		object->set_dict(dict);
		emit_changed(get_edited_property(), dict, "", true);
	}
}
void EditorPropertyDictionary::_change_type(Object *p_button, int p_index) {