* Handle default value for `PrefWindowSize` in code
* Add new Mac client resources to Transifex config
* Remove non-user-visible titles from XIB files
* Sync translations with code
* Sync translations with Transifex
GTK client: none.
Qt client: Japanese.
Mac client: none (there're suitable languages, but they're lacking XIB files
and we haven't switched to base localization yet).