home: wm: i3: fix 'toggle-xautolock'

Because of DPMS, I would still get a screen-lock after a 10-minute
timeout.

I think the `xset s {on,off}` part is not _strictly_ necessary, but a
little bit of cargo-culting never hurt anybody.

According to the `xss-lock` man page `xset s on` use hard-coded values,
not my preferred timeouts. Given that I rely on `xautolock` anyway, I
don't care about the timeouts and set them to `0`.

modules/home/wm/i3/default.nix

@@ -47,10 +47,14 @@ let
       if ${systemctlUser} is-active xautolock-session.service; then
         ${systemctlUser} stop --user xautolock-session.service
         xset s off
+        xset s 0 0
+        xset -dpms
         ${notify} "Disabled Xautolock"
       else
         ${systemctlUser} start xautolock-session.service
         xset s on
+        xset s 0 0
+        xset +dpms
         ${notify} "Enabled Xautolock"
       fi
     '';