XF.pageLoadScrollFix() causes browsers to lose scroll position on reload

[Steffen]

How to reproduce:

1. Open a XenForo page with an anchor link: https://xenforo.com/community/threa...importers-1-5-1-released.198197/#post-1538490
2. Scroll up or down a bit (away from the anchor link)
3. Reload the page

What should have happened: The browser should have kept the new scroll position, i.e. it should not scroll back to the anchor link. (This is the default behavior of all browsers as you can test for example here...

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