[Feature] Name Cherry Pick Branch
<!--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=17462) </details> <!--IssueSummary end--> ### Description Allow providing a name for the branch created during a cherry pick merge request. ### Use case - Cleaner environment URLs - Better readability in the branch list ### Proposal - Add a text input that is used for the branch name when a new cherry pick branch is created - Fall back to the existing `cherry-pick-ffffffff` format if the input is empty ![Screenshot_from_2017-03-09_10-32-20](/uploads/8cd36538a7c1612de3dab6c8bb391f09/Screenshot_from_2017-03-09_10-32-20.png)
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