abrt: Fix displaying of open file descriptors
abrt: Fix displaying of open file descriptors

Don't render empty items in any form or shape and also render the last
descriptor - `rows.push()` happens on every 5th iteration, which did
not cover the last item.

cockpit-project/cockpit,cockpit-project/cockpit,mvollmer/cockpit,cockpit-project/cockpit,martinpitt/cockpit,martinpitt/cockpit,martinpitt/cockpit,cockpit-project/cockpit,mvollmer/cockpit,martinpitt/cockpit,mvollmer/cockpit,mvollmer/cockpit,mvollmer/cockpit,martinpitt/cockpit,cockpit-project/cockpit