Lead conversion: leads not showing up anymore?

[Guido1982]

We've only very recently started to use the Leads module. During a test I noticed that a lead, once converted, isn't showing up in the module's list view anymore and is basically emptied and gone. I'm wondering what the purpose of this is. I mean sure we can change the status to converted and show that but why block the entire record? Do we have some global variable for this?