[mod] default template modifications

- more smartphone friendly
- more text browser friendly
- next button always on the right
- in case of small screen supporting touch event, categories are displayed on one line with a scroll

searx/templates/default/infobox.html

@@ -2,7 +2,7 @@
   <h2>{{ infobox.infobox }}</h2>
   {% if infobox.img_src %}<img src="{{ infobox.img_src }}" />{% endif %}
   <p>{{ infobox.entity }}</p>
-  <p>{{ infobox.content }}</p>
+  <p>{{ infobox.content | safe }}</p>
   {% if infobox.attributes %}
   <div class="attributes">
     <table>