fix file upload broken on Chrome 36 (#17151)

Contributed by Felix Schäfer.

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013183
fix file upload does not work with Safari (#13932)

Contributed by Felix Schäfer.

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013184
Czech translation updated by Karel Pičman (#17301)

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013185
revert r13183 (#17151)

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013186
Fix Invalid CSS on Error-Pages (#17206).

Patch by Daniel Felix

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013190
fix Japanese terms mismatch in workflow by Go MAEDA (#17308)

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4013194