[mod] simple theme: fix eslint errors, fix VIM keys

* VIM keys: fix the next page and previous pages (n, p keys)
* Map: Enable the wikipedia map (the layer was initialized but not included)

searx/static/themes/simple/src/js/head/00_init.js

@@ -15,6 +15,7 @@
 * (C) 2019 by Alexandre Flament
 *
 */
+/* global DocumentTouch:readonly */
 (function(w, d) {
     'use strict';