[Improvement] Annotation Information shall be loaded after lyrics is shown

[cyfung1031]

If the contents of annotations are heavy like this, there will be significant delay of displaying the lyrics (compared with "annotation off")

Such an extra information should be downloaded after lyrics is shown, to avoid displaying delay due to the download request of getting annotations.

Another example: https://genius.com/Yorushika-hitchcock-lyrics

[cyfung1031]

1. Download Request -> do other content editing -> show lyrics -> append annotation json response to the page -> do annotation stuff

2. Follow Genius Lyrics Site (reliable in case the multi annotation API not working) -> request annotation details only by the mouseenter to the annotation text