Updated mediawiki/extensions
Project: mediawiki/extensions/Translate  dcf24286de278cb07cf278566030141723d0089f
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Create /source-language unit pages for translatable pages

* And even more simplifying to Special:PageTranslation
* Add TranslatablePage::getSourceLanguageCode
** To anticipate future features
** Not used everywhere yet

Change-Id: Ia263ee22639ab30506489df362c8de440eb8c077

Cleanup Special:PageTranslation more

Change-Id: Ia5655ae5fab8b885be3730e31ac6de7fe114220d