migrate nav panel items to actionbar

Fixes #1819
Closes #1839
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improve some content descriptions

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Merge pull request #1854 from mcginty/content-description

improve some content descriptions
apntool and ApnDatabase

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Avoid leaking cursor.

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Closes #1838
Updated language translations.

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prevent another cursor leak

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Merge pull request #1861 from mcginty/cursor-leak

prevent another cursor leak
disable localized collators in ApnDB

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Merge pull request #1862 from mcginty/db-localization-ignore

disable localized collators in ApnDB
Bump version to 2.1.6

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