### 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
if (!container) {
			container = memnew(MarginContainer);
			container->set_theme_type_variation("MarginContainer4px");
			add_child(container);
			set_bottom_editor(container);
			VBoxContainer *vbox = memnew(VBoxContainer);
			container->add_child(vbox);
			property_vbox = memnew(VBoxContainer);
			property_vbox->set_h_size_flags(SIZE_EXPAND_FILL);
			vbox->add_child(property_vbox);
			paginator = memnew(EditorPaginator);
			paginator->connect("page_changed", callable_mp(this, &EditorPropertyDictionary::_page_changed));
			vbox->add_child(paginator);
		} else {
			
			for (int i = property_vbox->get_child_count() - 1; i >= 0; i--) {
				property_vbox->get_child(i)->queue_free();
			}
		}
		int size = dict.size();
		int max_page = MAX(0, size - 1) / page_length;
		page_index = MIN(page_index, max_page);
		paginator->update(page_index, max_page);
		paginator->set_visible(max_page > 0);
		int offset = page_index * page_length;
		int amount = MIN(size - offset, page_length);
		int total_amount = page_index == max_page ? amount + 2 : amount; 
		VBoxContainer *add_vbox = nullptr;
		double default_float_step = EDITOR_GET("interface/inspector/default_float_step");
		for (int i = 0; i < total_amount; i++) {