search all messages, not separate groups

@Nemo: my bad, what I was using is the list *filter* (upper right corner of the table here), which I suppose is fetching data from the server as it filters them. Special:SearchTranslations definitely helps for these hard-to-find messages, but for general use it lacks the comfort of being able to see and edit related messages without ever leaving the translation tool (Special:Translate) page. Thanks!