Add additional parameter to config['xwiki-macro'].insertButtons to choose between inserting directly or through the wizard (the current behavior).

The

 config['xwiki-macro'].insertButtons

 insert additional buttons to the editor which start the macro wizard (with the specified parameters). Similiar buttons like "table of contents" fire the macro directly without a user intervention (intern calling 'xwiki-macro-insert'). 

It's more comfort to be able to do it the same way just depending on  an additional flag.