3.22.3:
* Minor rendering improvements (bug #732776)
* Add flatpak manifests for nightly builds
* Drop use of deprecated GTK+ API (no dependency change)
* Translations:
** be (Yuras Shumovich)
** ca (Jordi Mas)
** el (Tom Tryfonidis)
** gl (Fran Dieguez)
** lv (RÅ«dolfs Mazurs)
** ru (Yuri Myasoedov)
** uk (Daniel Korostil)