message: nav usability fix
diff: <div class="footer uk-margin-remove-top" uk-grid>
  - <div class="uk-width-1-1 uk-text-center" style="padding-top: 15px;">
  + <div class="uk-width-1-1 uk-text-center" style="padding-top: 15px; padding-bottom: 60px;">
  <a href="https://github.com/BitDesert/Nault" uk-icon="icon: github-alt" uk-tooltip title="View our GitHub" class="footer-link" target="_blank" rel="noopener"></a>
  <a href="https://twitter.com/TheNanoCenter" uk-icon="icon: twitter" uk-tooltip title="Chat with us on Twitter" class="footer-link" target="_blank" rel="noopener"></a>
  <a href="https://discord.nanocenter.org" uk-icon="icon: users" uk-tooltip title="Join our community on Discord" class="footer-link" target="_blank" rel="noopener"></a>
  