Last modified: 2012-08-21 20:23:21 UTC
I'm not actually sure what the pin button is supposed to do... but it currently shows a completely blank screen. You can go back to the list view by hitting the Android back button, but it feels a bit sketchy.
I think we should just remove it. It's not clear if this is a map icon or a welcome page icon. It could be either. The fact it is broken suggests this has not been thought out.
https://github.com/wikimedia/WLMMobile/pull/151