sway: fix gtk apps startup delay (incl waybar)

reform2-imx8mq/template-skel/.config/sway/config

@@ -262,6 +262,11 @@ for_window [app_id="xfce4-appfinder"] floating enable
 
 include @sysconfdir@/sway/config.d/*
 
+# fix up to 20 second startup time of GTK applications
+exec systemctl --user import-environment DISPLAY WAYLAND_DISPLAY SWAYSOCK
+exec hash dbus-update-activation-environment 2>/dev/null && \
+     dbus-update-activation-environment --systemd DISPLAY WAYLAND_DISPLAY SWAYSOCK
+
 # waybar
 exec /usr/local/bin/waybar