admin translations: fallbacks for language detection

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3514 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
image advanced (with hotspots): backward compatibility bugfix

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3515 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
build auto version (2869) ...

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3516 1f8fe7d8-47f0-464c-8d0a-336f4953ab05