big change to SharedPreferences: make all the values in RubikScores save their preferences just-in-time, and not on the exit of the app.
SharedPreferences
more work on Preferences
minor
simplify Preferences interface of OSInterface
editor.commit -> editor.apply
Move preferences to JIT model.
About dialog; up to v. 2.2.4
dialog, version up to 2.2.3
2.2.3-test2
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