In large projects it is much more practical to open files using a fuzzy finder. For this reason nearly all modern editors off fuzzy file finding out of the box. GitLab even has one in the repo view: https://docs.gitlab.com/ee/workflow/file_finder.html We should add support for fuzzy file finding to the multi-file editor. ### Design We can use a similar UI as to the file finder in the merge request diff tab:  - When first opening the file finder, let's provision it with 2-4 recently closed files if possible - Let's get the icons and file path in there as well similar to [atom](https://gitlab.com/gitlab-org/gitlab-ee/uploads/4807b4ddc934e5a54acd3385e55a7f97/image.png) This will get us to:   Let's get the same hotkey functional if possible: `t` (if editor is not selected)