Revert "add domain button on top of Domains page."

I've tested this, and I'm afraid I don't like it from a design perpective as it is not consistent with the other pages, and it looks inverted when only one domain is present. Perhaps we can design this better, though I'm not sure how.

app/views/domains/index.html.haml

@@ -26,8 +26,6 @@
       %p.noData__button= link_to "Add your first domain", [:new, organization, @server, :domain], :class => "button button--positive"
 
   - else
-    %p.u-center= link_to "Add new domain", [:new, organization, @server, :domain], :class => "button button--positive"
-    %br/
     %ul.domainList.u-margin
       - for domain in @domains
         %li.domainList__item
@@ -73,3 +71,4 @@
                 = link_to "DNS setup", [:setup, organization, @server, domain]
               = link_to "Delete", [organization, @server, domain], :remote => :delete, :method => :delete, :data => {:confirm => "Are you sure you wish to remove this domain?", :disable_with => "Deleting..."}, :class => 'domainList__delete'
 
+    %p.u-center= link_to "Add new domain", [:new, organization, @server, :domain], :class => "button button--positive"