[enh] oscar_template: improve result visualisation

* highlight parts of result
* add link to archiv.to
* fix little bugs
* add little icons
* change style of "show map" button

searx/static/oscar/less/oscar/cursor.less

@@ -2,3 +2,7 @@
 .cursor-text {
     cursor: text !important;
 }
+
+.cursor-pointer {
+    cursor: pointer !important;
+}