### Godot version

v4.0.stable.official [92bee43ad]

### System information

Linux - v4.0.stable.official [92bee43ad]

### Issue description

It gives you the possibility of removing unexisting key/value pairs from a dictionary.

### Steps to reproduce

![image](https://github.com/godotengine/godot/assets/69520693/35beadbe-bfdd-4176-9b26-222bbf69cafa)
![image](https://github.com/godotengine/godot/assets/69520693/7ed647e0-a2af-4e58-9f00-f77b7bc7bb02)
![image](https://github.com/godotengine/godot/assets/69520693/f08bf824-8408-45eb-bb84-f1dc7e19e392)


### Minimal reproduction project

N/A
new_item_key = p_new_item;
}
Variant EditorPropertyDictionaryObject::get_new_item_key() {
	return new_item_key;
}
void EditorPropertyDictionaryObject::set_new_item_value(const Variant &p_new_item) {
	new_item_value = p_new_item;
}
Variant EditorPropertyDictionaryObject::get_new_item_value() {
	return new_item_value;
}
EditorPropertyDictionaryObject::EditorPropertyDictionaryObject() {
}
void EditorPropertyArray::initialize_array(Variant &p_array) {
	if (array_type == Variant::ARRAY && subtype != Variant::NIL) {
		Array array;
		StringName subtype_class;
		Ref<Script> subtype_script;
		if (subtype == Variant::OBJECT && !subtype_hint_string.is_empty()) {
			if (ClassDB::class_exists(subtype_hint_string)) {
				subtype_class = subtype_hint_string;
			}
		}
		array.set_typed(subtype, subtype_class, subtype_script);
		p_array = array;
	} else {
		VariantInternal::initialize(&p_array, array_type);
	}
}
void EditorPropertyArray::_property_changed(const String &p_property, Variant p_value, const String &p_name, bool p_changing) {