[docs] [issue28044] Make the sidebar in the documentation follow the section automatically

[Batiste]

Batiste added the comment:

Here is a second patch which is improved in some ways:

1. removed the '.headerlink .headerlink'
2. when scrolling over the side bar the 'snappin' is disabled therefor it is rather easy to search and find the desired section or the search box
3. removed an error when collapsing the menu
4. Scrolling all the way down with a small viewport doesn't push the sidebar over the footer

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Added file: http://bugs.python.org/file44590/following-sidebar-2.patch

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<http://bugs.python.org/issue28044>
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