2018-02-08 gmchess 0.29.6.3

* Fix a typo that could lead to crashing.
* Various clean-up.

2018-01-29 gmchess 0.29.6.2
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* I18n and translation for preferences subpage.
* Various clean-up.

2018-01-25 gmchess 0.29.6.1
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* Various clean-up.
