Allow opening multiple new/edit forms

Closes #30

lib/core_ext/action_view/record_identifier_with_suffix.rb

@@ -0,0 +1,9 @@
+module CoreExt::ActionView::RecordIdentifierWithSuffix
+  def dom_id(object, prefix = nil, suffix = nil)
+    if suffix
+      "#{super(object, prefix)}#{::ActionView::RecordIdentifier::JOIN}#{suffix}"
+    else
+      super(object, prefix)
+    end
+  end
+end