Maintain scroll location after user clicks into a search result

Created by: jjinnii

Expected behavior:

As a user, if I navigate to a file from search results and return to the Sourcegraph search tab, I would expect to maintain my scroll position from before I clicked into the search result.

Actual behavior:

Currently, if a user clicks into a search result and returns to the Sourcegraph search tab, a user is returned to the top of the search results. This is a problem because I lose the context of the results I was viewing before I navigated to a file.

Additional context:

Request made from internal feedback.