[Zope] Tutorial prod has 'open box' icon, others have 'closed box' what's the difference?

[Jeff Kowalczyk]

Just a simple question as I navigate the learning curve of Zope. I
followed the tutorial on creating the simple, searchable "JobBoard"
product.
http://www.zope.org/Members/mukhsein/job_board_howto

And its icon in 'products' has what looks like an 'open box', while the
others, built-ins and imports, have a closed box icon. What is that
telling me, that I haven't set a distribution policy on my created
JobBoard yet?

Thanks