ugly workaround, change theme to open in same window

themes/hugo-theme-docdock-master/layouts/partials/original/body-beforecontent.html

@@ -41,7 +41,7 @@
             {{- range sort . "Weight"}}
                 <li class="" role="">
                     {{- .Pre -}}
-                    <a href="{{.URL}}" target="_blank" rel="noopener">{{safeHTML .Name}}</a>
+                    <a href="{{.URL}}" target="_self" rel="noopener">{{safeHTML .Name}}</a>
                     {{- .Post -}}
                 </li>
             {{- end}}