Merge pull request #829 from anaHue/fix_missing_icon

[Frontend/Submissions] fix - change class for file code icon

inginious/frontend/templates/course_admin/submissions.html

@@ -176,7 +176,7 @@ <h2>{{_("Submissions")}}</h2>
                 <td>
                     <div class="btn-group btn-group-sm" role="group">
                         <a href="{{get_homepath()}}/submission/{{submission['_id']}}"
-                           class="btn btn-secondary" title="{{ _('View submission') }}" data-toggle="tooltip" data-placement="bottom"><i class="fa file-code-o fa-fw"></i></a>
+                           class="btn btn-secondary" title="{{ _('View submission') }}" data-toggle="tooltip" data-placement="bottom"><i class="fa fa-file-code-o fa-fw"></i></a>
                         <a href="{{get_homepath()}}/admin/{{course.get_id()}}/submissions?download_submission={{submission['_id']}}#alerts" class="btn btn-secondary" title="{{ _('Download submission') }}" data-toggle="tooltip"
                            data-placement="bottom"><i class="fa fa-download"></i></a>
                         {% if is_admin %}