Conversation window redesign

[Sean Egan]

Here's another version where the layout more closely matches that of
the buddy list: http://pidgin.im/~seanegan/convwindowmock-2.png

This eliminates redundancy. The two lines are less cluttered than the
three, and it makes conceptual sense. It wouldn't be out of the realm
of reason to give this the blist's tooltip and context menu as well.

http://pidgin.im/~seanegan/new-conversation-window.png This is Hylke's
original mockup, which includes -vv features, but we both agree that
pane was too large.

-s.