Fix campaign detail directory URL

templates/twitch/campaign_detail.html

@@ -94,8 +94,12 @@
             {% endfor %}
         </div>
     {% else %}
-        <h5>Allowed Channels</h5>
-        <p style="color: #666; font-style: italic;">All channels allowed or no channel restrictions specified.</p>
+        <a href="{{ campaign.game.twitch_directory_url }}"
+           target="_blank"
+           rel="noopener noreferrer"
+           title="Find streamers playing {{ campaign.game.display_name }} with drops enabled">
+            Go to a participating live channel
+        </a>
     {% endif %}
     <h5>Campaign Info</h5>
     {% if drops %}