ENH Update translations

lang/en.yml

@@ -18,6 +18,7 @@ en:
   SilverStripe\Admin\Forms\UsedOnTable:
     ADDEDTODRAFT: Draft
     MODIFIEDONDRAFTSHORT: Modified
+    UNTITLED: Untitled
   SilverStripe\Admin\GroupImportForm:
     Help1: '<p>Import one or more groups in <em>CSV</em> format (comma-separated values). <small><a href="#" class="toggle-advanced">Show advanced usage</a></small></p>'
     Help2: '<div class="advanced"><h4>Advanced usage</h4><ul><li>Allowed columns: <em>{columns}</em></li><li>Existing groups are matched by their unique <em>Code</em> value, and updated with any new values from the imported file</li><li>Group hierarchies can be created by using a <em>ParentCode</em> column.</li><li>Permission codes can be assigned by the <em>PermissionCode</em> column. Existing permission codes are not cleared.</li></ul></div>'