Add ability to go to a specific playlist item

In addition: add hovertext on playlist controls

grzegorz_clients/api.py

@@ -82,6 +82,11 @@ def get_playlist():
 def playlist_next():
     return f"playlist/next", None
 
+@request_post
+def playlist_goto(index:int):
+    args = urlencode(locals())
+    return f"playlist/goto?{args}", None
+
 @request_post
 def playlist_previous():
     return f"playlist/previous", None