### Godot version

v4.0.beta.custom_build [13f0158]

### System information

Windows 10

### Issue description

When doing operations (`begin_complex_operation` and `end_complex_operation`) with multiple selections in TextEdit, some of these selections don't revert upon undo. This behavior is affects some of script editor's operations, like duplicate selection and delete lines.

### Steps to reproduce

Open script editor, make multiple selections. Keep in mind what you have selected. Do duplicate selection (ctrl+shift+D). Undo (ctrl+Z). Compare the result to what you remember.

### Minimal reproduction project

N/A
const List<Ref<InputEvent>> *events = InputMap::get_singleton()->action_get_events(p_action);
	if (!events) {
		return Key::NONE;
	}
	
	const List<Ref<InputEvent>>::Element *first_event = events->front();
	if (!first_event) {
		return Key::NONE;
	}
	const Ref<InputEventKey> event = first_event->get();
	if (event.is_null()) {
		return Key::NONE;
	}
	
	if (event->get_physical_keycode() != Key::NONE) {
		return event->get_physical_keycode_with_modifiers();
	} else {
		return event->get_keycode_with_modifiers();
	}
}
void TextEdit::_generate_context_menu() {