<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=348818) </details> <!--IssueSummary end--> Identified in https://gitlab.com/gitlab-org/gitlab-design/-/issues/1644. When creating or editing a merge request, add [loading state](https://design.gitlab.com/components/button) to the “Create merge request” and “Save changes” buttons when clicked:   Please review [this guidance](https://gitlab.com/groups/gitlab-org/-/epics/7518#note_834866630) before contributing to this issue.