More fixes for UI in case of extreme screen (w/h) ratios ( from 1.0 to 2.0 ).
Move the control of object scaling out the objectlib.Thee xact way the object is scaled needs to be decided in the app, as only the app knows that e.g. in the Rubik main screen, if it is a square, then obejct needs to be a bit smaller than in case of Config screen (if that one happens to be a square)
TutorialActivity: link to PurchaseActivity.
Block rotating layes of not free objects in the Tutorial Activity.
Further improvements for the UI.
Improve UI proportions on squarish screens.
Convert 'buy whole app' to 'buy all puzzles'
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