add keybinding options

mpv-youtube-queue.conf

@@ -3,13 +3,15 @@ download_current_video=ctrl+d
 download_selected_video=ctrl+D
 move_cursor_down=ctrl+j
 move_cursor_up=ctrl+k
+load_queue=ctrl+l
 move_video=ctrl+m
 play_next_in_queue=ctrl+n
 open_video_in_browser=ctrl+o
 open_channel_in_browser=ctrl+O
 play_previous_in_queue=ctrl+p
 print_current_video=ctrl+P
 print_queue=ctrl+q
+save_queue=ctrl+s
 remove_from_queue=ctrl+x
 play_selected_video=ctrl+ENTER
 browser=firefox