CUSP-1346 - Add support for existing-folders

Signed-off-by: Stephen Simpson <ssimpson89@users.noreply.github.com>

templates/root.html

@@ -164,7 +164,9 @@
         <div class="version-grid">
             {% for row in version_rows %}
             {% set outer_loop = loop %}
-            {% for major, minor in row %}
+            {% for item in row %}
+            {% if item %}
+            {% set major, minor = item %}
             <a href="{{ major }}.{{ minor }}/index.html" class="version-card{% if not outer_loop.first %} small{% endif %}">
                 <div class="version-number">{{ major }}.{{ minor }}</div>
                 {% if outer_loop.first %}
@@ -172,6 +174,9 @@
                 <div class="version-browse">Browse man pages →</div>
                 {% endif %}
             </a>
+            {% else %}
+            <div></div>
+            {% endif %}
             {% endfor %}
             {% endfor %}
         </div>