ui: use Files instead of Additional Files

packages/ui-default/templates/partials/discussion_list.html

@@ -29,6 +29,7 @@
                 {{ vndict[ddoc.parentType][ddoc.parentId].title|default(_('(missing)')) }}
               </a>
             </li>
+            <li>{{ _('{0} views').format(ddoc.views) }}</li>
             <li>
               {{ user.render_inline(udict[ddoc.owner], badge=false) }}
               @

packages/ui-default/templates/problem_files.html

@@ -27,7 +27,7 @@
   <div class="medium-4 columns">
     <div class="section">
       <div class="section__header">
-        <h1 class="section__title">{{ _('Additional Files') }}</h1>
+        <h1 class="section__title">{{ _('Files') }}</h1>
         <div class="section__tools">
           {% if handler.user.own(pdoc, perm.PERM_EDIT_PROBLEM_SELF) or handler.user.hasPerm(perm.PERM_EDIT_PROBLEM) %}
             <button class="primary rounded button" name="create_file">{{ _('Create File') }}</button>