set map tile source even when there is no internet connection
Update zh-TW strings to dev branch again, per requested in #1066
Fix indent
Merge pull request #1374 from petercpg/dev

Update zh-TW strings to dev branch
Merge pull request #1370 from cascheberg/fix-map

Set map tile source even when there is no internet connection
Moving the persisted stats out of DataStorageManager. Over time we want
to minimize the amount of responsibilities in that class.
Merge pull request #1375 from garvankeeley/move-persistedstats

Cleanup item: Moving the persisted stats out of DataStorageManager.