discourse/app/assets/javascripts/admin/templates/version_checks.js.handlebars

    <div {{bind-attr class=":dashboard-stats :version-check versionCheck.critical_updates:critical:normal"}}>
      <table class="table table-condensed table-hover">
        <thead>
          {{customHTML 'upgrade-header'}}
          <tr>
            <th>&nbsp;</th>
            <th>{{i18n admin.dashboard.installed_version}}</th>
            <th>{{i18n admin.dashboard.latest_version}}</th>
            <th>&nbsp;</th>
            <th>&nbsp;</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">{{ versionCheck.installed_version }}</a></td>

            {{#if versionCheck.noCheckPerformed}}
              <td class="version-number">&nbsp;</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">&nbsp;</td>
                <td class="face">
                  {{#if versionCheck.version_check_pending}}
                    <span class='icon up-to-date'>☻</span>
                  {{else}}
                    <span class="icon critical-updates-available">☹</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">{{ versionCheck.latest_version }}</td>
                <td class="face">
                  {{#if versionCheck.upToDate }}
                    <span class='icon up-to-date'>☻</span>
                  {{else}}
                    <span {{bind-attr class=":icon versionCheck.critical_updates:critical-updates-available:updates-available"}}>
                      {{#if versionCheck.behindByOneVersion}}
                        ☺
                      {{else}}
                        ☹
                      {{/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>