Comment 2 for bug 28055

Created an attachment (id=5593)
Bug fix

Here's a patch :) This also fixes a small design issue (buttons now have the
same width).

I can easily test the dialog's appearance on my system, but it's really tricky
to test the overall behavior (copying binary files into my /usr/bin doesn't let
me open a session, and same with ./configure --prefix=/usr). Anyway, I can't
test that this bug has been solved, but it really should :)