WIP: 20841 getting started better empty state for merge requests view ee (!1574) · Merge requests · GitLab.org / GitLab · GitLab

What does this MR do?

MR port for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7342

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

Changelog entry added, if necessary
Documentation created/updated
API support added
Tests
- Added for this feature/bug
- All builds are passing
Conform by the merge request performance guides
Conform by the style guides
Branch has no merge conflicts with master (if it does - rebase it please)
Squashed related commits together

What are the relevant issue numbers?

Closes #20841 (closed)