Crete MR button from fork

Closed Nataliia Radina requested to merge 384166-allow-to-create-merge-request into master

What does this MR do and why?

Adds a create MR button in case forked repo is ahead of its source

Screenshots or screen recordings


Screenshots are required for UI changes, and strongly recommended for all other merge requests.

How to set up and validate locally

  1. Go to a forked repo which is ahead of its source(or create one)
  2. Observe create MR button, check that it navigates to new mr page

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

Related to #384166 (closed)