Follow-up from "Groups tree enhancements for Groups Dashboard and Group Homepage"
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## Overview
Add support for browser back button once user searches for a group and matching results are loaded.
## Original discussion
The following discussion from gitlab-ce!14302 should be addressed:
- [ ] @iamphill started a [discussion](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/14302#note_40603012): (+4 comments)
> Do we not want to `pushState` & then handle when the user presses the back button?
issue