Open [diff] links into their own window

backend/templates/watch-overview.html

@@ -67,7 +67,7 @@
                        class="pure-button button-small pure-button-primary">Recheck</a>
                     <a href="/edit/{{ watch.uuid}}" class="pure-button button-small pure-button-primary">Edit</a>
                     {% if watch.history|length >= 2 %}
-                    <a href="/diff/{{ watch.uuid}}" class="pure-button button-small pure-button-primary">Diff</a>
+                    <a href="/diff/{{ watch.uuid}}" target="{{watch.uuid}}" class="pure-button button-small pure-button-primary">Diff</a>
                     {% endif %}
                 </td>
             </tr>