Adds firstname initials+lastname user format.

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Adds settings for disabling browser language detection and language preference (#2691).

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Adds locales strings (#2691).

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adjust tests to awesome_nested_set new node lft and rgt value behavior change

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012693
fix comment of awesome_nested_set new node lft and rgt value behavior change

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