logos in project lists

I wanted to add project logos to the list in https://kwarc.info/projects/ and https://kwarc.info/systems/ and I changed '/_layouts/psitem.html', see the XXX there. But this is not nice. I want the logo on the left of each item vertically aligned with the text of the li, so that it looks like a label.

This is not urgent, but would be nice.

assigned to @twiesing

changed title from logos in projects to logos in project lists

closed with commit 25d7df7f

Finally got around to it.