Bug

[Aman-0604]

@softchris There is a bug on the web page. When we reach at the end of the page, then in the side baar Other curricula link item class does not get "active" and the last class that become "active" is Lessons link item. This doesn't provides a good user experience.

I can fix this bug. Can I open a pull request for the same on 1st October as I am participating in Hactoberfest and this repo has Hactoberfest tag.

Here is the screenshot of the side baar, see Lessons link item is active i.e it's border color has become blue but when we reach at the end of the page, Other curricula link item should become active i.e it's border color should become blue.