Closing window with scripting

Hi,

I have 'Fiorinized' the MIGO transaction with personas & added it to the Fiori Launchpad.

So far so good.

The only issue i have now is the back button.

In most tutorials they use the standard back button & change the icon to a more Fiori look.

The problem is that when you click the back button you end up in the start transaction of SAP (SMEN).

The wanted behavior should be that the (new) tab where the MIGO was openend, is closed.

I tried through scripting with window.close & a few other variants, but I don't get it working.

Any ideas on how to tackle this?

Thanks in advance!

Peter