Issue 2101 - Avoid duplicate interface page strings.

includes/interface.tmpl

 {#
  # This file is part of the Adblock Plus website,
  # Copyright (C) 2006-2015 Eyeo GmbH
  #
  # Adblock Plus is free software: you can redistribute it and/or modify
  # it under the terms of the GNU General Public License version 3 as
  # published by the Free Software Foundation.
  #
  # Adblock Plus is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 49 matching lines @@
         (
         {% for argument in property.arguments %}
           {{ argument.modifier }} {{ argument.type }} {{ argument.name }}
           {%- if not loop.last %},{% endif %}
         {% endfor %}
         )
       </p>
       {{ property.description() }}
       <dl>
         {% if property.version %}
-          <dt>Version:</dt>
-          <dd>{{ property.version }} and higher</dd>
+          <dt>{{ "minversion_label"|translate("interface") }}</dt>
+          <dd>{{ property.version }} {{ "minversion_addendum"|translate("interface") }}</dd>
         {% endif %}
         {% if property.arguments|length %}
-          <dt>Arguments:</dt>
+          <dt>{{ "arguments_label"|translate("interface") }}</dt>
           {% for argument in property.arguments %}
             <dd>
               <span class="argumentname">{{ argument.name }}</span>:
               {{ property["description-" + argument.name]() }}
             </dd>
           {% endfor %}
         {% endif %}
         {% if "description-return" in property %}
-          <dt>Returns:</dt>
+          <dt>{{ "returnvalue_label"|translate("interface") }}</dt>
           <dd>{{ property["description-return"]() }}</dd>
         {% endif %}
       </dl>
     {% else %}
       <p id="prop_{{ property.name }}">
         {{ property.modifier }} {{ property.type }}
         <span class="propname">{{ property.name }}</span>
       </p>
       {{ property.description() }}
     {% endif %}
   {% endfor %}
 {% endmacro %}