message: server upgrade
diff: {{server.version}} Update Available
  <span class="mdc-list-item__text__secondary">Version {{server.installed}}</span>
  </span>
  - <section class="mdc-card__actions">
  - <button class="upgrade-server-button mdc-button mdc-button--compact mdc-card__action">Upgrade</button>
  - </section>
  - {{/update}} {{^update}}
  + <button type="button" class="upgrade-server-button mdc-button mdc-button--raised mdc-button--primary mdc-ripple-surface" data-mdc-auto-init="MDCRipple">Upgrade</button>
  + {{/update}}
  + {{^update}}
  <span class="mdc-list-item__start-detail status-item green-bg" role="presentation">
  <i class="material-icons" aria-hidden="true">&#xE627;</i>
  </span>
  