Let custom field formats control how they are edited.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3675 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/custom_field_format.rb

@@ -48,6 +48,13 @@ module Redmine
       }
     end
 
+    # Allow displaying the edit type of another field_format
+    #
+    # Example: display a custom field as a list
+    def edit_as
+      name
+    end
+
     class << self
       def map(&block)
         yield self