Add scroll function to Fix Ancho

Closed Christopher Guindon requested to merge github/fork/flora8984461/yiliu/master/fixAnchor into master

Created by: flora8984461

Fix #191 (closed)

This is set to draft because I'm waiting for to be merged.

The data is loaded by Async which is causing the url#hashtag not working for the first time. I have to manually scroll.

Some test links:

Signed-off-by: Yi Liu

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