[css] pagination: add `active` class on the current page link

views.py

@@ -244,7 +244,8 @@
         url = self._cw.build_url(**url_params)
         if page == current_page:
             ul(t.li(t.a(t.b(page),
-                        href=xml_escape(url))))
+                        href=xml_escape(url)),
+               Class="active",))
         else:
             ul(t.li(t.a(page,
                         href=xml_escape(url))))