Magic Cube

Fix for the previous fix :)

Fix a potential crasher ( do not set up a callback for end of rotation effect on the very first cubit that belongs to a rotation if all belonging cubits have not been set up yet )

There's a real crash from the field in Firebase Crashlytics which must mean that Cubit.returnRotationAngle() returned null.
Leave some message in case this happens again.

Change the format of moves in Pretty Patterns to more terse, so that patterns of objects with 4 axis of rotation ( Pyraminx!) fit into 3 digits.

PYRAMINX: swap the red and blue face colors so that the whole thing matches randelshofer.ch

Add a 'withdraw move' button to the Solving UI state.

Make chances to randimoze a given row when scrambling dependant on the type of Object.

The point: in case of the Cube, all rows should have equal chances. In case of the Pyraminx, the smaller the row, the smaller the chance should be. In particular the trivial 4 corners of the tetraherdon should have a very small chance to be selected.

Each object size now has its own number of levels (not always 18!)

Progress with the Solver - RubikCube.retObjectString() finished.

What remains to be done here: ban changing colors of the centers of 3x3x3 faces, this shouldn't be allowed!

Progress implementing RubikCube.retObjectString()