Show only non-zero thread count in the tag detailed info

boards/templates/boards/all_threads.html

@@ -73,9 +73,17 b''
                 <p>{{ tag.get_description|safe }}</p>
             {% endif %}
             <p>
-                {% blocktrans count count=tag.get_active_thread_count %}{{ count }} active thread{% plural %}active threads{% endblocktrans %},
-                {% blocktrans count count=tag.get_bumplimit_thread_count %}{{ count }} thread in bumplimit{% plural %} threads in bumplimit{% endblocktrans %},
-                {% blocktrans count count=tag.get_archived_thread_count %}{{ count }} archived thread{% plural %}archived threads{% endblocktrans %},
+                {% with active_count=tag.get_active_thread_count bumplimit_count=tag.get_bumplimit_thread_count archived_count=tag.get_archived_thread_count %}
+                    {% if active_count %}
+                        {% blocktrans count count=active_count %}{{ count }} active thread{% plural %}active threads{% endblocktrans %},
+                    {% endif %}
+                    {% if bumplimit_count %}
+                        {% blocktrans count count=bumplimit_count %}{{ count }} thread in bumplimit{% plural %} threads in bumplimit{% endblocktrans %},
+                    {% endif %}
+                    {% if archived_count %}
+                        {% blocktrans count count=archived_count %}{{ count }} archived thread{% plural %}archived threads{% endblocktrans %},
+                    {% endif %}
+                {% endwith %}
                 {% blocktrans count count=tag.get_post_count %}{{ count }} message{% plural %}messages{% endblocktrans %}.
             </p>
             {% if tag.get_all_parents %}