better error message when no results found

searx/templates/simple/elements/engines_msg.html

@@ -1,5 +1,9 @@
 <div id="engines_msg">
+  {% if not results and not answers %}
+  <details class="sidebar-collapsable" open>
+  {% else %}
   <details class="sidebar-collapsable">
+  {% endif %}
     <summary class="title" id="engines_msg-title">{{ _('Messages from the search engines') }}</summary>
     <div class="dialog-error" role="alert">
       {{ icon_big('warning') }}

searx/templates/simple/messages/no_results.html

@@ -1,5 +1,11 @@
 {% from 'simple/icons.html' import icon_big %}
-<div class="dialog-error" role="alert">
+<div class="dialog-error-block" role="alert">
   <p><strong>{{ _('Sorry!') }}</strong></p>
-  <p>{{ _("we didn't find any results. Please use another query or search in more categories.") }}</p>
+  <p>{{ _("No results were found. You can try to:") }}</p>
+  <ul>
+    <li>{{ _("Refresh the page.") }}</li>
+    <li>{{ _("Search for another query or select another category (above).") }}</li>
+    <li>{{ _("Change the search engine used in the preferences:") }} <a href="/preferences">/preferences</a></li>
+    <li>{{ _("Switch to another instance:") }} <a href="https://searx.space">https://searx.space</a></li>
+  </ul>
 </div>