4.19.4 - Update copyright year - Update `.gitignore` - Add new CI builds to build without X11 and Wayland - build: Search for bind_textdomain_codeset in libintl too - sm-client: Reset SmcConnection when IceConnection is closed on error - docs: Improve xfce_sm_client_get() - build: Make libsm optional again - build: Do not use ENABLE_X11/WAYLAND in installed headers - build: Adapt ABI check so it passes with --disable-x11 - build: Use AM_DISTCHECK_CONFIGURE_FLAGS - build: Properly distinguish X11/Wayland code paths - cleanup: Remove useless X11-specific includes, formatting - xfce4-about: Use GdkGLContext for system tab - Replace deprecated xfce_spawn_command_line_on_screen() - Add title to read manual dialog - Translation Updates: Albanian, Bulgarian, Catalan, Chinese (China), Chinese (Taiwan), Croatian, Danish, Dutch, English (United Kingdom), Estonian, French, German, Greek, Interlingue, Italian, Japanese, Korean, Lithuanian, Norwegian Bokmål, Occitan (post 1500), Polish, Portuguese, Portuguese (Brazil), Russian, Serbian, Slovenian, Spanish, Swedish, Turkish, Ukrainian