[imp] Change global configuration

[Rodrigo Monteiro]

Hi all!

I'm using Horde Groupware Webmail Edition 1.0.1.

sentmail:
- Change the sentmail folder to be ".Sent", not ".sent-mail"?. I'm
migratin from Squirrelmail to Horde, and Squirrelmail saves the e-mail
in this folder.

inbox:
- When the user login in the Horde, to get automatically in the Imp
Inbox on the right frame.

theme:
- Change the default theme?

Thanks,
Rodrigo.