Upload a file with a password

customize.dist/translations/messages.js

@@ -604,6 +604,8 @@ define(function () {
     out.upload_rename = "Do you want to rename <b>{0}</b> before uploading it to the server?<br>" +
                         "<em>The file extension ({1}) will be added automatically. "+
                         "This name will be permanent and visible to other users.</em>";
+    out.upload_password = "Do you want to protect your file with a password?<br>" +
+                          "If you choose <em>Do not ask me again</em>, uploaded files won't have a password.";
     out.upload_serverError = "Server Error: unable to upload your file at this time.";
     out.upload_uploadPending = "You already have an upload in progress. Cancel it and upload your new file?";
     out.upload_success = "Your file ({0}) has been successfully uploaded and added to your drive.";