This change fixes up two issues we've found while testing the unified

banner:

Selecting a single review reply and then clicking "Publish" would end

   up publishing all replies. This was due to a conditional that needed

   to be done in the opposite order.
A last-minute change for the handler that scrolls to the selected

   review reply left it with some undefined variable errors (since we

   were no longer getting the model from the arguments). This has been

   fixed to use this.model.

Verified that both bugs were fixed.