ui: fix another paginator

packages/ui-default/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.37.5",
+  "version": "4.37.6",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",

packages/ui-default/templates/partials/problem_list.html

@@ -6,7 +6,7 @@
 {% if not pdocs.length %}
   {{ nothing.render('Sorry, there is no problem in the problem set') }}
 {% else %}
-  {{ paginator.render(page, ppcount, position='top', add_qs=qs) }}
+  {{ paginator.render(page, ppcount, position='top', add_qs=('q=' + qs if qs else '')) }}
   <table class="data-table hide-problem-tag">
     <colgroup>
       <col class="col--checkbox display-mode-hide">