No you can not to my knowledge. The only thing you could do is using submicroflows. In the first microflow create a string with a name of the button and then call the submicroflow that is for all those microflows the same. You still have a seperate microflow for each button but the inner workings are all the same (ie the second microflow that is being called). This way when something needs to change you only have to do it in one place instead of 20.