### 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
int to_col = get_selection_to_column(caret_to_save);
			int selection_line = get_selection_line(caret_to_save);
			int selection_col = get_selection_column(caret_to_save);
			bool at_from = (get_caret_line(caret_to_save) == get_selection_from_line(caret_to_save) && get_caret_column(caret_to_save) == get_selection_from_column(caret_to_save));
			if (at_from) {
				if (get_selection_line(caret_to_remove) > get_selection_line(caret_to_save) || (get_selection_line(caret_to_remove) == get_selection_line(caret_to_save) && get_selection_column(caret_to_remove) >= get_selection_column(caret_to_save))) {
					selection_line = get_selection_line(caret_to_remove);
					selection_col = get_selection_column(caret_to_remove);
				}
			} else if (get_selection_line(caret_to_remove) < get_selection_line(caret_to_save) || (get_selection_line(caret_to_remove) == get_selection_line(caret_to_save) && get_selection_column(caret_to_remove) <= get_selection_column(caret_to_save))) {
				selection_line = get_selection_line(caret_to_remove);
				selection_col = get_selection_column(caret_to_remove);
			}
			if (get_selection_from_line(caret_to_remove) < get_selection_from_line(caret_to_save) || (get_selection_from_line(caret_to_remove) == get_selection_from_line(caret_to_save) && get_selection_from_column(caret_to_remove) <= get_selection_from_column(caret_to_save))) {
				from_col = get_selection_from_column(caret_to_remove);
			} else {
				to_col = get_selection_to_column(caret_to_remove);
			}
			select(from_line, from_col, to_line, to_col, caret_to_save);
			set_selection_mode(selecting_mode, selection_line, selection_col, caret_to_save);
			set_caret_line((at_from ? from_line : to_line), caret_to_save == 0, true, 0, caret_to_save);
			set_caret_column((at_from ? from_col : to_col), caret_to_save == 0, caret_to_save);
			remove_caret(caret_to_remove);
			i--;
			caret_edit_order = get_caret_index_edit_order();
			continue;
		}
		
		if (has_selection(first_caret)) {
			if (get_caret_line(second_caret) >= get_selection_from_line(first_caret) && get_caret_line(second_caret) <= get_selection_to_line(first_caret) && (get_caret_line(second_caret) > get_selection_from_line(first_caret) || get_caret_column(second_caret) >= get_selection_from_column(first_caret)) && (get_caret_line(second_caret) < get_selection_to_line(first_caret) || get_caret_column(second_caret) <= get_selection_to_column(first_caret))) {