[fix] simple: the clear button works without javascript

related to #928

searx/templates/simple/search.html

@@ -5,8 +5,8 @@
       {% include '__common__/searxng-wordmark.min.svg' without context %}
     </a>
     <div class="search_box">
-      <input id="q" autofocus name="q" type="text" placeholder="{{ _('Search for...') }}" autocomplete="off" spellcheck="false" dir="auto" {% if q %}value="{{ q }}"{% endif %} >
-      <button id="clear_search" type="button" aria-label="{{ _('clear') }}"><span class="hide_if_nojs">{{ icon_big('close') }}</span><span class="show_if_nojs">{{ _('clear') }}</span></button>
+      <input id="q" autofocus name="q" type="text" placeholder="{{ _('Search for...') }}" autocomplete="off" spellcheck="false" dir="auto" value="{{ q or '' }}">
+      <button id="clear_search" type="reset" aria-label="{{ _('clear') }}"><span class="hide_if_nojs">{{ icon_big('close') }}</span><span class="show_if_nojs">{{ _('clear') }}</span></button>
       <button id="send_search" type="submit" aria-label="{{ _('search') }}"><span class="hide_if_nojs">{{ icon_big('search-outline') }}</span><span class="show_if_nojs">{{ _('search') }}</span></button>
     </div>
     {% set display_tooltip = true %}

searx/templates/simple/simple_search.html

@@ -1,8 +1,8 @@
 <form id="search" method="{{ method or 'POST' }}" action="{{ url_for('search') }}" role="search">
   <div id="search_header">
     <div class="search_box">
-      <input id="q" autofocus name="q" type="text" placeholder="{{ _('Search for...') }}" autocomplete="off" spellcheck="false" dir="auto" {% if q %}value="{{ q }}"{% endif %} >
-      <button id="clear_search" type="button" aria-label="{{ _('clear') }}"><span class="hide_if_nojs">{{ icon_big('close') }}</span><span class="show_if_nojs">{{ _('clear') }}</span></button>
+      <input id="q" autofocus name="q" type="text" placeholder="{{ _('Search for...') }}" autocomplete="off" spellcheck="false" dir="auto" value="{{ q or '' }}">
+      <button id="clear_search" type="reset" aria-label="{{ _('clear') }}"><span class="hide_if_nojs">{{ icon_big('close') }}</span><span class="show_if_nojs">{{ _('clear') }}</span></button>
       <button id="send_search" type="submit" aria-label="{{ _('search') }}"><span class="hide_if_nojs">{{ icon_big('search-outline') }}</span><span class="show_if_nojs">{{ _('search') }}</span></button>
     </div>
   </div>