ui: add complex descriptors selection in problem search (#636)

Co-authored-by: undefined <i@undefined.moe>
Co-authored-by: panda <panda_dtdyy@outlook.com>

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

@@ -1,8 +1,9 @@
 <ul class="group-list" data-widget-cf-container>
-  {%- for category, sub_categories in model.system.get('problem.categories')|parseYaml -%}
+  {% set _categories = (handler.domain.problemCategories or model.system.get('problem.categories'))|parseYaml %}
+  {%- for category, sub_categories in _categories -%}
     <li class="group-list__item">
       <h2 class="section__title">
-        <a href="{{ url('problem_main', query={q:'category:'+category}) }}" data-category="{{ category }}">{{ category }}</a>
+        <a href="{{ url('problem_main', query={q:'category:'+category}) }}">{{ category }}</a>
       </h2>
       {% if sub_categories | length > 0 %}
         <ol class="chip-list">