dev-user-changer broken in localized apps

[haslinger]

In case of a localized app, where you use detault url options ending ?locale=de <dev-user-changer> is broken.

So in my app I patch it according to the definition in hobo_bootstrap / taglibs / nav.dryml by exchanging ?login with &login like so

<def tag="dev-user-changer">
  <set user="&Hobo::Model::UserBase.default_user_model"/>
  <select-menu if="&user && Rails.env.development?"
               first-option="#{t('hobo.dev_user_changer.guest', {:default=>'Guest'})}" options="&user.all(:limit => 30).*.login"
               onchange="location.href = '#{dev_support_path :action=>:set_current_user}&login=' + encodeURIComponent(this.options[this.selectedIndex].value)"
               selected="#{current_user.login}"
               class="dev-user-changer"
               merge-attrs/>
</def>

I'm not sure how the general case should be handled.
Besides that minor issue, a fantastic gem!