tweaks to file dialog wildcards to also accept *.* option.  updated CHANGES
fixed possible issues with new undo states.  fixed race condition with parameter change update notifications.  attempted fix of clicks when finishing Record with Overdub... issues still exist, especially when finishing record with multiply.
removed redundancy in midibindings fileselector
fixed crash caused by new midi command choice
fixed slgui dropping messages for loops > 5

I got the initial registration/get, that fires when you add and
remove loops too, to make its own little thread and send everything
4 loops at a time.