Use the full path to the partials

When trying to use the issue form in a plugin, it would try to use the
relative path to the partials which were incorrect.

  Example: would render 'my_plugin_views/attributes'

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4089 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/issues/_attributes.rhtml

@@ -40,6 +40,6 @@
 </div>
 
 <div style="clear:both;"> </div>
-<%= render :partial => 'form_custom_fields' %>
+<%= render :partial => 'issues/form_custom_fields' %>
 
 <% end %>

app/views/issues/_form.rhtml

@@ -20,7 +20,7 @@
 </div>
 
 <div id="attributes" class="attributes">
-	<%= render :partial => 'attributes' %>
+	<%= render :partial => 'issues/attributes' %>
 </div>
 
 <% if @issue.new_record? %>