History of a git file shall not display other files in the same commit

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When a user is interested to check the History changes of a file, GitLab displays all the commits where the file was changed. But upon clicking on commit, it has all files modified in it. This is not user friendly. The user is interested only in his file changes. The History is supposed to show differences in interested file only.

This feature is very well implemented in BitBucket. There is a dropdown for History and user can click on any commit and see the content of the file in that particular commit. This is very much necessary for GitLab also.

Reproduction steps (by @vyaklushin)

1. Visit a file (for example, https://gitlab.com/gitlab-org/gitlab/-/blob/master/Gemfile?ref_type=heads)
2. Click on History button
3. Click on one of the commits
4. You will see all changes made by the commit