simplewallet: print reason why refresh+password is needed

src/simplewallet/simplewallet.cpp

@@ -4166,7 +4166,7 @@ boost::optional<epee::wipeable_string> simple_wallet::on_get_password(const char
   // can't ask for password from a background thread
   if (!m_in_manual_refresh.load(std::memory_order_relaxed))
   {
-    message_writer(console_color_red, false) << tr("Password needed - use the refresh command");
+    message_writer(console_color_red, false) << boost::format(tr("Password needed (%s) - use the refresh command")) % reason;
     m_cmd_binder.print_prompt();
     return boost::none;
   }