This setting determines the logo image that appears on the Front Page
and the default logo for Traction projects that don't specify their own
logo image.
The Traction logo is the usual default:
You can upload a new image from your computer by choosing its filename
with the Browse button, then
clicking the +).
The file you just uploaded will then appear in the list. You
can press the (- to remove the listed filename from the server.
After applying changes on the page, the new logo is used.
