### 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_COND(p_caret > carets.size());
	begin_complex_operation();
	Vector<int> caret_edit_order = get_caret_index_edit_order();
	for (const int &i : caret_edit_order) {
		if (p_caret != -1 && p_caret != i) {
			continue;
		}
		delete_selection(i);
		int from_line = get_caret_line(i);
		int from_col = get_caret_column(i);
		int new_column, new_line;
		_insert_text(from_line, from_col, p_text, &new_line, &new_column);
		_update_scrollbars();
		set_caret_line(new_line, false, true, 0, i);
		set_caret_column(new_column, i == 0, i);
		adjust_carets_after_edit(i, new_line, new_column, from_line, from_col);
	}
	if (!ime_text.is_empty()) {
		for (int i = 0; i < carets.size(); i++) {
			String t;
			if (get_caret_column(i) >= 0) {
				t = text[get_caret_line(i)].substr(0, get_caret_column(i)) + ime_text + text[get_caret_line(i)].substr(get_caret_column(i), text[get_caret_line(i)].length());
			} else {
				t = ime_text;