### 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
ERR_FAIL_INDEX_V(p_line_from, text.size(), ABS(p_visible_amount));
	if (!_is_hiding_enabled()) {
		return ABS(p_visible_amount);
	}
	int num_visible = 0;
	int num_total = 0;
	if (p_visible_amount >= 0) {
		for (int i = p_line_from; i < text.size(); i++) {
			num_total++;
			if (!_is_line_hidden(i)) {
				num_visible++;
			}
			if (num_visible >= p_visible_amount) {
				break;
			}
		}
	} else {
		p_visible_amount = ABS(p_visible_amount);
		for (int i = p_line_from; i >= 0; i--) {
			num_total++;
			if (!_is_line_hidden(i)) {
				num_visible++;
			}
			if (num_visible >= p_visible_amount) {
				break;
			}