Well heres a thought, just do it through the definition file...
create an element that wraps around the tile container that is only activated when the plus condition is true.
And if you want the dp to always appear (as is never disappear on resize) then just set the contact list to have a fixed minimum height, thus eliminating the possibility of hiding it on resize.
Look it up in the skin docs (the schema is your best friend) if you're not sure. You have to learn