simple theme update

- npm package update
- apply #1226
- implement vim help dialog
- display cookies and search URL with preferences
- allow to enable / disable Open Access DOI rewrite
- add a clear text button on the left of the search button
- implement #1011 : the HTML title page is not set when using POST
- remove searx/static/themes/simple/img/loader.gif
- use full width when only there are only images as result

searx/static/themes/simple/js/searx_src/searx_mapresult.js

@@ -90,13 +90,14 @@
                   newHtml += "</td></tr>";
                 }
               }
-              result_table_loadicon.classList.add('invisible');
+	      result_table_loadicon.parentNode.removeChild(result_table_loadicon);
               result_table.classList.remove('invisible');
               result_table.querySelector("tbody").innerHTML = newHtml;
             }
           })
           .catch(function() {
-            result_table_loadicon.innerHTML = result_table_loadicon.innerHTML + "<p class=\"text-muted\">could not load data!</p>";
+            result_table_loadicon.classList.remove('invisible');
+            result_table_loadicon.innerHTML = "could not load data!";
           });
         }
       }