### 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
if (caret_column != new_caret_column) {
				int _; 
				_get_above_below_caret_line_column(caret_line, get_caret_wrap_index(caret_index), caret_from_column, p_below, _, new_caret_from_column);
				_get_above_below_caret_line_column(caret_line, get_caret_wrap_index(caret_index), caret_to_column, p_below, _, new_caret_to_column);
			} else {
				new_caret_from_column = caret_from_column;
				new_caret_to_column = caret_to_column;
			}
		}
		
		const int new_caret_index = add_caret(new_caret_line, new_caret_column);
		if (new_caret_index == -1) {
			continue;
		}
		
		if (new_caret_from_column != new_caret_to_column) {
			select(new_caret_line, new_caret_from_column, new_caret_line, new_caret_to_column, new_caret_index);
			
			carets.write[new_caret_index].selection.selecting_line = new_caret_line;
			carets.write[new_caret_index].selection.selecting_column = new_caret_column == new_caret_from_column ? new_caret_to_column : new_caret_from_column;
			continue;
		}
		
		carets.write[new_caret_index].last_fit_x = carets[caret_index].last_fit_x;
	}
	merge_overlapping_carets();
	queue_redraw();
}
Vector<int> TextEdit::get_caret_index_edit_order() {