Add sha info to Translation page
Rename BatchKeyAndCommitRecalculator to ProjectDescendantsRecalculator
Rename ProjectTranslationAdderFinisher class to ProjectTranslationAdder::Finisher, and moves into the same file.
Rename TranslationsMassCopier to ProjectTranslationsMassCopier
Rename TranslationCopier to KeyTranslationCopier
Rename KeyTranslationAdder to KeyTranslationAdderAndRemover
Rename ProjectTranslationAdder to ProjectTranslationsAdderAndRemover
Don't update commit_ids in ElasticSearch in Key.batch_recalculate_ready
Move ImporterFinisher into CommitImporter
Run KeyTranslationAdderAndRemover for eveery Key under Project
ProjectDescendantsRecalculator recalculates ready for KeyGroups too