[fix] search: don't show categories without active engine

searx/templates/simple/categories.html

@@ -14,7 +14,7 @@
 <div id="categories" class="search_categories">{{- '' -}}
     <div id="categories_container">
         {%- if not search_on_category_select or not display_tooltip -%}
-            {%- for category in categories_as_tabs -%}
+            {%- for category in categories -%}
                 <div class="category category_checkbox">{{- '' -}}
                     <input type="checkbox" id="checkbox_{{ category|replace(' ', '_') }}" name="category_{{ category }}"{% if category in selected_categories %} checked="checked"{% endif %}/>
                     <label for="checkbox_{{ category|replace(' ', '_') }}" class="tooltips">
@@ -25,7 +25,7 @@
             {%- endfor -%}
             {%- if display_tooltip %}<div class="help">{{ _('Click on the magnifier to perform search') }}</div>{% endif -%}
         {%- else -%}
-            {%- for category in categories_as_tabs -%}{{- '\n' -}}
+            {%- for category in categories -%}{{- '\n' -}}
                 <button type="submit" name="category_{{ category }}" class="category category_button {% if category in selected_categories %}selected{% endif %}">
                     {{- icon_big(category_icons[category]) if category in category_icons else icon_big('globe-outline') -}}
                     <div class="category_name">{{- _(category) -}}</div>{{- '' -}}