[fix] genius: add player an avoid exceptional programming

Add player:

- The players are just playing 30sec from the title.  Some of the player will be
  blocked because of a cross-origin request and some players will link to apple
  when you press the play button.

Avoid exceptions and (and BTW improve results)

-  ERROR   searx.engines.genius          : list index out of range

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/static/themes/simple/src/less/embedded.less

@@ -27,3 +27,7 @@ iframe[src^="https://bandcamp.com/EmbeddedPlayer/track"] {
   // hide playlist
   height: 120px;
 }
+
+iframe[src^="https://genius.com/songs"] {
+  height: 65px;
+}