### 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 v_scroll_speed;
}
void TextEdit::set_fit_content_height_enabled(const bool p_enabled) {
	if (fit_content_height == p_enabled) {
		return;
	}
	fit_content_height = p_enabled;
	update_minimum_size();
}
bool TextEdit::is_fit_content_height_enabled() const {
	return fit_content_height;
}
double TextEdit::get_scroll_pos_for_line(int p_line, int p_wrap_index) const {
	ERR_FAIL_INDEX_V(p_line, text.size(), 0);
	ERR_FAIL_COND_V(p_wrap_index < 0, 0);
	ERR_FAIL_COND_V(p_wrap_index > get_line_wrap_count(p_line), 0);
	if (get_line_wrapping_mode() == LineWrappingMode::LINE_WRAPPING_NONE && !_is_hiding_enabled()) {
		return p_line;
	}
	double new_line_scroll_pos = 0.0;
	if (p_line > 0) {
		new_line_scroll_pos = get_visible_line_count_in_range(0, MIN(p_line - 1, text.size() - 1));
	}
	new_line_scroll_pos += p_wrap_index;
	return new_line_scroll_pos;
}
void TextEdit::set_line_as_first_visible(int p_line, int p_wrap_index) {