[#566] Make page stay at the anchor when changing languages

[lacexd]

Summary

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Docs
• Build-related changes
• Other, please describe:

If changing the UI of default theme, please provide the before/after screenshot:

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• Yes
• [X ] No

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The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)

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• Firefox
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If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature
• Related documents have been updated
• Related tests have been updated

To avoid wasting your time, it's best to open a feature request issue first and wait for approval before working on it.

Other information:

[kefranabg]

Hi @lacexd, thanks for opening the PR.

I made a test a this is not working:

• go to http://localhost:8080/guide/markdown.html#github-style-tables
• change language

It does not scroll to the section. It only works for the sections where hash name does not change between language. Maybe we need a count system to scroll to the correct section.