[horde] Finding answers for things we had tweaked in Horde 3

[D G Teed]

I have a couple of items we used to have working well in horde
but I'm not sure how to do in horde 4.

1. In servers.php we used to set:

$servers['_prompt'] = array(
    'name' => _("Choose a mail server:")
);

This way, it did not default to any server,
people had to choose.  It doesn't work as before.
I see this prompt only if I click on the drop down box,
but I want it to display on that input field when loading the page.

2. Our organization logo used to appear in the left corner.  I tried
using the same GIF we had before but nothing happens.
In conf.php I have:
$conf['logo']['image'] = '/my_logo.gif';
There is no reference to the filename in error.log of apache.
Also tried without the leading / and no luck.