#139 Constant checking for invisible

[Malte Skoruppa]

Hi,

it would be nice if there was the possibility to set up a "constant
checking for invisible" for specific users.

I mean, let's say there's a user from who I know he's oftenly invisible
when he's online. It would be nice if SIM could automatically check
every 5 minutes or so if he's invisible when he seems to be offline. I
don't feel like clicking on "Check for invisible" (or whatever it's called
in english, I use the german version, "Unsichtbar prüfen") every now
and again. It would be even better if it was possible to specify this
interval (1 minute, or 5 minutes, or 30 minutes or whatever).