Can I ask - when you push that menu key what actually happens? I can't test this because later model Galaxy's use the lower left button for swapping between active apps, so there's no menu button anymore
But it would help to know what happens on earlier galaxies. If it hides the toolbar so the whole screen is available for stars / galaxies etc, then great as Sim Corporation only need to add minor functionality. Hopefully in their next minor release to fix this oversight.