Fixed Side bar nav on docs

[strizzwald]

Please make the side bar fixed on the documentation. The side bar should not scroll as I scroll down along the documentation of a selected component, I think it should scroll when it has mouse focus. The current way makes it tedious to navigate between component documentation.

[abhigyantiwari]

+1

[GuacheSuede]

#6109

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 30 days if no further activity occurs. Thank you for your contributions.