Restart gvfs after wake to restore FUSE mount

gvfsd-fuse is spawned by gvfsd during init and not respawned if it
dies. After lazy-unmounting in pre-sleep, restart gvfs-daemon.service
in post-sleep so the FUSE mount at /run/user/*/gvfs is restored.

default/systemd/system-sleep/unmount-fuse

@@ -3,7 +3,7 @@
 # Lazy-unmount all FUSE filesystems before suspend/hibernate to prevent the
 # kernel's process freeze from timing out. FUSE daemons (like gvfsd-fuse from
 # Nautilus) can block in uninterruptible sleep during freeze, causing suspend
-# to silently fail. The FUSE daemons restart automatically on wake.
+# to silently fail. After wake, restart gvfs so the FUSE mount is restored.
 
 if [[ $1 == "pre" ]]; then
   while IFS=' ' read -r _ mountpoint fstype _; do
@@ -12,3 +12,15 @@ if [[ $1 == "pre" ]]; then
     fi
   done < /proc/mounts
 fi
+
+if [[ $1 == "post" ]]; then
+  for uid_dir in /run/user/*; do
+    uid=$(basename "$uid_dir")
+    if [[ -S $uid_dir/bus ]]; then
+      sudo -u "#$uid" \
+        DBUS_SESSION_BUS_ADDRESS="unix:path=$uid_dir/bus" \
+        XDG_RUNTIME_DIR="$uid_dir" \
+        systemctl --user restart gvfs-daemon.service 2>/dev/null || true
+    fi
+  done
+fi