discourse/app/assets/javascripts/admin/templates/version-checks.hbs

<div {{bind-attr class=":dashboard-stats :version-check versionCheck.critical_updates:critical:normal"}}>
  <table class="table table-condensed table-hover">
    <thead>
      {{custom-html 'upgrade-header'}}
      <tr>
        <th>&nbsp;</th>
        <th>{{i18n 'admin.dashboard.installed_version'}}</th>
        <th colspan="3">{{i18n 'admin.dashboard.latest_version'}}</th>
      </tr>
    </thead>
    {{#unless loading}}
      <tbody>
        <td class="title">{{i18n 'admin.dashboard.version'}}</td>
        <td class="version-number"><a {{bind-attr href="versionCheck.gitLink"}} target="_blank">{{dash-if-empty versionCheck.installed_describe}}</a></td>

        {{#if versionCheck.noCheckPerformed}}
          <td class="version-number">&mdash;</td>
          <td class="face">
            <span class="icon critical-updates-available">☹</span>
          </td>
          <td class="version-notes">
            <span class="normal-note">{{i18n 'admin.dashboard.no_check_performed'}}</span>
          </td>
        {{else}}
          {{#if versionCheck.staleData}}
            <td class="version-number">{{#if versionCheck.version_check_pending}}{{dash-if-empty versionCheck.installed_version}}{{/if}}</td>
            <td class="face">
              {{#if versionCheck.version_check_pending}}
                <span class='icon up-to-date'>{{fa-icon "smile-o"}}</span>
              {{else}}
                <span class="icon critical-updates-available">{{fa-icon "frown-o"}}</span>
              {{/if}}
            </td>
            <td class="version-notes">
              <span class="normal-note">
                {{#if versionCheck.version_check_pending}}
                  {{i18n 'admin.dashboard.version_check_pending'}}
                {{else}}
                  {{i18n 'admin.dashboard.stale_data'}}
                {{/if}}
              </span>
            </td>
          {{else}}
            <td class="version-number">{{dash-if-empty versionCheck.latest_version}}</td>
            <td class="face">
              {{#if versionCheck.upToDate }}
              <span class='icon up-to-date'>{{fa-icon "frown-o"}}</span>
              {{else}}
                <span {{bind-attr class=":icon versionCheck.critical_updates:critical-updates-available:updates-available"}}>
                  {{#if versionCheck.behindByOneVersion}}
                    {{fa-icon "smile-o"}}
                  {{else}}
                    {{fa-icon "frown-o"}}
                  {{/if}}
                </span>
              {{/if}}
            </td>
            <td class="version-notes">
              {{#if versionCheck.upToDate }}
                {{i18n 'admin.dashboard.up_to_date'}}
              {{else}}
                <span class="critical-note">{{i18n 'admin.dashboard.critical_available'}}</span>
                <span class="normal-note">{{i18n 'admin.dashboard.updates_available'}}</span>
                {{i18n 'admin.dashboard.please_upgrade'}}
              {{/if}}
            </td>
          {{/if}}
        {{/if}}
      </tbody>
    {{/unless}}
  </table>
</div>