Empathy Help Update

[Milo Casagrande <miloc gnome org>]

Hello everyone,

I updated a little bit Empathy help in order to fix the new theme and UI.
In particular I did a small update to the topic about the previous
conversations. The UI for that task has through a complete redesign...
I tried to keep it as simple as possible, I would be happy if somebody
could give it a read and report (or commit directly) any improvements.

Ciao.

-- 
Milo Casagrande <miloc gnome org>