### 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
return text_direction;
}
void TextEdit::set_language(const String &p_language) {
	if (language != p_language) {
		language = p_language;
		TextServer::Direction dir;
		if (text_direction == Control::TEXT_DIRECTION_INHERITED) {
			dir = is_layout_rtl() ? TextServer::DIRECTION_RTL : TextServer::DIRECTION_LTR;
		} else {
			dir = (TextServer::Direction)text_direction;
		}
		text.set_direction_and_language(dir, (!language.is_empty()) ? language : TranslationServer::get_singleton()->get_tool_locale());
		text.invalidate_all();
		_update_placeholder();
		queue_redraw();
	}
}
String TextEdit::get_language() const {