4.18.3 - Add comment about the need for gtk_widget_destroy() - Fix memory management in Vala generated code - Add annotation "(nullable)" where appropriate - Replace deprecated annotation: "(allow-none)" - Harden xfce_gtk_handle_tab_accels (thunar#1067) - screensaver: Avoid Xfconf warning - shortcuts-grabber: Ignore keyboard layout change - screensaver: Fix Xfconf memory management