[imp] selecting IMP / DIMP / MIMP

[Liam Hoekenga]

> I'm not opposed, but I don't know offhand where we'd put that in IMP's  
> UI (or any of the others). A preference seems like a good option;  
> actually merging all 3 into a single distribution so we can ensure  
> they're available and act accordingly would probably help too.
>
>   
What makes more sense, do you think?  Having a "view" preference inside 
of IMP that selects IMP / DIMP / MIMP, or using Horde's "initial 
application" pref?

Liam