Consolidate merge request main actions in one place
### Problem Currently the main (frequent/important) actions of a merge request are scattered throughout the UI. This causes many problems: - Decreases feature discoverability - Increases time spent finding these frequent or important actions - Increases user's cognitive load - Relies more on user's memory than intuitiveness As an example, notice the current placement of the actions highlighted in red: ![CleanShot_2020-09-15_at_17.19.23](https://gitlab.com/gitlab-org/gitlab/uploads/a3ae8807eca6ca8868f44e3bdc057938/CleanShot_2020-09-15_at_17.19.23.png) ### Proposal We should try to consolidate all of the main (frequent/important) actions of a merge request in one single location of the UI, always accessible to the user. - [WIP in Figma 🔗](https://www.figma.com/file/q2fr4kFx0EFcbUYZhdQIUq/Consolidate-merge-request-main-actions-in-one-place?node-id=1%3A62) #### Relevant research findings in Dovetail 🕊 - [Overview tab - needs to be improved](https://dovetailapp.com/projects/8caf91dc-8b99-4e05-b040-57428bf55b5c/insights/present/30756ad7-3156-4657-94ed-66576cfeacdc) - [MR commands center](https://dovetailapp.com/projects/8caf91dc-8b99-4e05-b040-57428bf55b5c/insights/present/b504f952-6ae7-4cca-a028-3417f6a87826) - [Place 'Merge' option on code review page](https://dovetailapp.com/projects/8caf91dc-8b99-4e05-b040-57428bf55b5c/insights/present/2f3ace3b-3b2d-4da3-ada5-77a00eedf5be) <!-- triage-serverless v3 PLEASE DO NOT REMOVE THIS SECTION --> *This page may contain information related to upcoming products, features and functionality. It is important to note that the information presented is for informational purposes only, so please do not rely on the information for purchasing or planning purposes. Just like with all projects, the items mentioned on the page are subject to change or delay, and the development, release, and timing of any products, features, or functionality remain at the sole discretion of GitLab Inc.* <!-- triage-serverless v3 PLEASE DO NOT REMOVE THIS SECTION -->
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