[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/static/default/js/searx.js

@@ -41,5 +41,9 @@ if(searx.autocompleter) {
         }
     });
 
+    if (!!('ontouchstart' in window)) {
+        document.getElementsByTagName("html")[0].className += " touch";
+    }
+
 })(window, document);