Domain RR's should be sortable

[kennethkalmer]

There is no way to choose the sorting in the "Domain RR" section. Its suggested that would should be able click on hostname, type, data to sort by that column.

For example its very important to sort by IP address so one can see what IPs are not yet assigned

http://kennethkalmer.lighthouseapp.com/projects/11831/tickets/72-add-sorting-of-domain-rr-entries-by-column-title