plain ui: functional website link on assembly pages, again

closes #695

src/plainui/jinja2/plainui/assembly.html.j2

@@ -50,10 +50,10 @@
           <div class="hub-tags">
             {{ tagboxMacro.tag(_("Website") ,
             icon="globe",
-            link=assembly.assembly_link.resolved_url,
+            link=assembly.assembly_link,
             style="secondary",
-            target=('_self' if assembly.assembly_link.resolved_url_internal else '_blank'),
-            rel=('' if assembly.assembly_link.resolved_url_internal else 'external')
+            target='_blank',
+            rel='external'
             ) }}
           </div>
         {% endif %}