4.18.4 - screensaver: Prevent recursive calling of lock command - screensaver: Add lock-on-sleep property - screensaver: Update fallback list - screensaver: Prioritize user lock command - screensaver: Rewrite D-Bus proxies management - screensaver: Use reasonable timeout for methods that may not reply - screensaver: Remove support for gnome-screensaver (Fixes #62) - screensaver: Do not take into account empty commands - screensaver: Simplify Xfconf management - screensaver: Fix memory leak - screensaver: Fix typos - screensaver: Run lock command synchronously (Fixes #70) - screensaver: Add missing include guard