Merge pull request #1161 from NASA-IMPACT/1154-delta-urls-with-a-coun…

…t-of-0-on-the-collection-list-page-do-not-have-active-link-to-delta-urls-page

Conditional anchor updated for 0 Delta URLs

sde_indexing_helper/templates/sde_collections/collection_list.html

@@ -148,8 +148,8 @@ <h2 class="title">Welcome back!</h2>
 
                     <!-- Delta URLs Column - Shows count and links if > 0 -->
                     <td class="noBorder centerAlign">
-                        <a href=" {% if collection.num_delta_urls > 0 %} {% url 'sde_collections:delta_urls' collection.pk %} {% endif %} "
-                           class="btn btn-sm {% if collection.num_delta_urls > 0 %}btn-primary {% else %}disabled{% endif %}candidateCount"
+                        <a href=" {% if collection.num_delta_urls >= 0 %} {% url 'sde_collections:delta_urls' collection.pk %} {% endif %} "
+                           class="btn btn-sm {% if collection.num_delta_urls >= 0 %}btn-primary {% else %}disabled{% endif %}candidateCount"
                            role="button">{{ collection.num_delta_urls|intcomma }}</a>
                     </td>