[fix] simple template: macro checkbox_onoff_reversed

In its previous implementation, the macro ``checkbox_onoff_reversed`` always
created an ``aria-labelledby`` attribute, even if there was no descriptive tag
with the generated ID (used as the value of the ``aria-labelledby``).

Before this patch, the Nu-HTML-Checker [1] reported 255 issues of this type::

    The aria-labelledby attribute must point to an element in the same document. (255)

[1] https://validator.w3.org/nu/

Signed-off-by: Markus <markus@venom.fritz.box>

1 files changed, 2 insertions, 2 deletions

diff --git a/searx/templates/simple/preferences/answerers.html b/searx/templates/simple/preferences/answerers.html
index 98ae61830..983646ae9 100644
--- a/searx/templates/simple/preferences/answerers.html
+++ b/searx/templates/simple/preferences/answerers.html
@@ -33,10 +33,10 @@
     {%- for plugin in plugins -%}
       {%- if plugin.preference_section == 'query' -%}
         <tr>{{- '' -}}
-          <td class="checkbox-col">{{- checkbox_onoff_reversed('plugin_' + plugin.id, plugin.id not in allowed_plugins) -}}</td>{{- '' -}}
+          <td class="checkbox-col">{{- checkbox_onoff_reversed('plugin_' + plugin.id, plugin.id not in allowed_plugins, 'plugin_labelledby' + plugin.id) -}}</td>{{- '' -}}
           <td>{{ plugin.query_keywords|join(', ') }}</td>{{- '' -}}
           <td>{{ _(plugin.name) }}</td>{{- '' -}}
-          <td>{{ _(plugin.description) }}</td>{{- '' -}}
+          <td id="{{ 'plugin_labelledby' + plugin.id }}">{{ _(plugin.description) }}</td>{{- '' -}}
           <td>{{ plugin.query_examples }}</td>{{- '' -}}
         </tr>
       {%- endif -%}