Fix strings in the Extract service menu
Review Request #125439 - Created Sept. 28, 2015 and submitted
Currently the user-visible strings in the Extract service menu have all uppercase-starting words. Almost all their translations, on the other hand, have only the first word of the sentence starting with an uppercase. I don't see why we shouldn't do the same for the english language. This is also consistent with the
Compress to...string introduced by commit c13327e.