Back button on menu bar (from About or Help) resets the position

[fgerlits]

If you go to About or Help, and then tap the Android 'back' button at the bottom of the screen, you return to the view of the hypercube in its previous position, as expected.

But if you go to About or Help, and then tap the 'back' button on the menu bar inside the app, you return to the view of the hypercube in its starting position, i.e. it does a Reset, as well, which is not expected.

The 'back' button on the menu bar should work in the same way as the 'back' button at the bottom of the screen.