set a name for nameless buttons, re #1135

lib/export/export_start.inc.php

@@ -134,4 +134,4 @@ $export_pagecontent .= "<input type=\"hidden\" name=\"choose\" value=\"" . htmlR
 $export_pagecontent .= "<input type=\"hidden\" name=\"format\" value=\"" . htmlReady($format) . "\">";
 $export_pagecontent .= "</fieldset>";
 
-$export_weiter_button = "<footer>" . Button::create(_('Weiter') . ' >>' ) . "</footer></form>";
+$export_weiter_button = "<footer>" . Button::create(_('Weiter') . ' >>', 'continue') . "</footer></form>";

lib/extern/admin_extern.inc.php

@@ -263,7 +263,7 @@ if ($choose_module_form != '') {
             echo '</label>';
             echo "</fieldset>\n";
 
-            echo "<footer>" . Button::create(_("Weiter") . " >>") . "</footer>\n";
+            echo "<footer>" . Button::create(_("Weiter") . " >>", 'continue') . "</footer>\n";
             echo "</form><br>\n";
         }
     } else {