Allow to save Excel Workbook from Power Query Editor

When you work from Excel with Power Query editor you can not save the development steps that you have done on queries directly. You always first need to close the Power Query editor window, keep the changes and then save the workbook. After this you need to reopen the editor to continue with the query development work. Why no 'keep changes & save workbook'- button in the editor? Would be a great time saver