Use normalized url for iqdb similar search

app/assets/javascripts/uploads.js

@@ -20,7 +20,7 @@
   }
 
   Danbooru.Upload.initialize_iqdb_source = function() {
-    $.get("/iqdb/similar_by_source", {"source": $("#upload_source").val()}).done(function(html) {$("#iqdb-similar").html(html)});
+    $.get("/iqdb/similar_by_source", {"source": $("#normalized_url").val()}).done(function(html) {$("#iqdb-similar").html(html)});
   }
 
   Danbooru.Upload.initialize_enter_on_tags = function() {

app/views/uploads/new.html.erb

@@ -17,6 +17,8 @@
     <%= error_messages_for "upload" %>
 
     <%= form_for(@upload, :html => {:multipart => true, :class => "simple_form", :id => "form"}) do |f| %>
+      <%= hidden_field_tag :normalized_url, @normalized_url %>
+
       <% if CurrentUser.is_contributor? %>
         <div class="input">
           <label for="upload_as_pending">