Magic Cube

Bugfixes.

Minor.

Minor.

Minor

Introduce RubikPatternsList. Now, if one wants to contribute patterns for a new object, all one has to be is give the list of strings describing the patterns and add them to the List.

Speed up displaying the Patterns Dialog - do not read the whole thing, but only one Category at a time as required.

Minor.

Pretty Patterns: slight speedup.

Pretty Patterns: some patterns had 'empty' moves (i.e. angle 0). Correct the last 5 such patterns.

Pretty Patterns: some patterns had 'empty' moves (i.e. angle 0). Correct the next 6 such patterns.