updated the systemd service

service/data/ximper-unified-theme-switcher.service

 [Unit]
 Description=Ximper unified theme switcher
-After=graphical-session.target
 
 [Service]
+ExecStartPre=/bin/sleep 5
 ExecStart=/usr/bin/ximper-unified-theme-switcher-service
-Type=simple
-Restart=always
-RestartSec=1
+Restart=on-failure
 
 [Install]
-WantedBy=default.target
+WantedBy=graphical.target

service/data/ximper-unified-theme-switcher.timer

-[Unit]
-Description=Ximper unified theme switcher timer
-
-[Timer]
-OnStartupSec=3
-Unit=ximper-unified-theme-switcher.service
-
-[Install]
-WantedBy=default.target

service/meson.build

@@ -11,10 +11,6 @@ install_data(
     './data/ximper-unified-theme-switcher.service',
     install_dir: join_paths(prefix, 'lib', 'systemd', 'user')
 )
-install_data(
-    './data/ximper-unified-theme-switcher.timer',
-    install_dir: join_paths(prefix, 'lib', 'systemd', 'user')
-)
 
 cfg_dir = join_paths(sysconfdir, 'ximper-unified-theme-switcher')