### 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 s.substr(beg, end - beg);
	}
	return String();
}
Point2i TextEdit::get_line_column_at_pos(const Point2i &p_pos, bool p_allow_out_of_bounds) const {
	float rows = p_pos.y;
	rows -= theme_cache.style_normal->get_margin(SIDE_TOP);
	rows /= get_line_height();
	rows += _get_v_scroll_offset();
	int first_vis_line = get_first_visible_line();
	int row = first_vis_line + Math::floor(rows);
	int wrap_index = 0;
	if (get_line_wrapping_mode() != LineWrappingMode::LINE_WRAPPING_NONE || _is_hiding_enabled()) {
		Point2i f_ofs = get_next_visible_line_index_offset_from(first_vis_line, first_visible_line_wrap_ofs, rows + (1 * SIGN(rows)));
		wrap_index = f_ofs.y;
		if (rows < 0) {
			row = first_vis_line - (f_ofs.x - 1);
		} else {
			row = first_vis_line + (f_ofs.x - 1);
		}
	}
	if (row < 0) {
		row = 0;
	}
	if (row >= text.size()) {
		row = text.size() - 1;
	}
	int visible_lines = get_visible_line_count_in_range(first_vis_line, row);
	if (rows > visible_lines) {
		if (!p_allow_out_of_bounds) {