Fix duplicated labels in Test SMTP Config section (#6166)

CHANGELOG

@@ -70,6 +70,7 @@ CHANGELOG Roundcube Webmail
 - Fix various issues when downloading files with names containing non-ascii chars, use RFC 2231 (#5772)
 - Managesieve: Fix bug where text: syntax was forced for strings longer than 1024 characters (#6143)
 - Managesieve: Fix missing Save button in Edit Filter Set page of Classic skin (#6154)
+- Fix duplicated labels in Test SMTP Config section (#6166)
 
 RELEASE 1.3.4
 -------------

installer/test.php

@@ -268,11 +268,11 @@ if ($pass == '%p') {
     <td><?php echo $RCI->getprop('smtp_port'); ?></td>
   </tr>
   <tr>
-    <td><label for="smtp_user">Sender</label></td>
+    <td><label for="smtp_user">Username</label></td>
     <td><?php echo $user; ?></td>
   </tr>
   <tr>
-    <td><label for="smtp_pass">Recipient</label></td>
+    <td><label for="smtp_pass">Password</label></td>
     <td><?php echo $pass; ?></td>
   </tr>
 </tbody>