xfce-mcs-manager -> suggest signal poll interval == 1s

[Benedikt Meurer]

Kok, Auke wrote:
> as you can see I still have some hdd activity in the bg, and obviously 
> xfce4-panel, xfce4-mixer-plugin are still polling once a second. I am surprised 
> to also see Thunar popup at 1 poll every 5 second, and we already knew about orage.

Thunar uses the 5s wakeup to monitor the trash for changes. We don't use
Gamin/FAM there, because it would prevent removable volumes from being
unmounted with certain backends (most notably the inotify and kqueue
backends, tho I'm not 100% sure about inotify).

> Auke

Benedikt