For the life of me I cannot figure out what I have done to make the "mini bar" minimize button work. Sometimes it is functional and sometimes it is grayed out. When it is working, it works great. It allows me to minimize the fullscreen VM and, more importantly, a Ctrl-# switches to the display that contains a VM, whereas, when the button is grayed out a Ctrl-# will not move me to the virtual display that contains the fullscreen VM.
Is there something broken about this function? Is there a magic sequence I must go through to get it working? I just don't get it. When that minimize button on the mini bar is working there a lots of nice little benefits, but when it is not working, I can't figure out how to get it back.
Any hints?