cubicweb-portlets #3206150 Portal display is buggy when the "unrelated portlets" zone is empty [validation pending]

prioritynormal
typebug
done in0.3.1
load0.100
load left0.000
closed by#88af51f8a362 [css] fix buggy display when the top zone ("unrelated portlets") is empty.
patch[css] fix buggy display when the top zone ("unrelated portlets") is empty. [applied]