Ability to render multiple partials with view hook (#17763).

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013449
Ignore locales without :general_lang_name key (#18110).

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013450
Use relative URL for thumbnails according to :only_path option (#18119).

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013451