Ability to reorder RBL in the Exim config UI

As a Server Administrator, I want the ability to reorder RBL in the Exim config UI, so that so I can view the last RBLs first.

I'd like to see the ability to reorder the configured RBLs in WHM's Exim config UI. Currently the first custom RBL added is the one checked first when mail comes in, followed by the second configured, and so forth. The WHM options for Spamcop/Spamhaus are then checked last. Some RBLs will provide much more matches than others, for instance SpamHaus and Barracauda, so if one could reorder the RBL list then it can be ensured a certain list will be checked first, and therefore eliminating needless DNS lookups and traffic to other listed RBLs.