Magic Cube

Correct the style.

Convert the theme to be a MaterialTheme and the TransparentImageButton to be a MaterialButton - the first forced by the second, and the second because a MaterialButton gives us control over the location of the icon in top of it. We need that because of the new 'solve/scramble' split-button in the lower right of the Play screen.

Fix a lint error.

Use the off-center objects to display the object in Tutorial mode properly.
Now it is not covered by the right bar!

Move RubikControl to objectlib (as 'ObjectAutomator')
Hide ObjectPreRender inside objectlib and move its APi to ObjectControl.

Move yet more code to objectlib.

Remove all the flags - those are now in a separate module

add two missing files

Remove all files that have been separated into a new library 'objectlib'

Rename some assets for consistency