Replace textbox by a dropdown list for selecting branch when you create a branch from an issue
<!--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=520281) </details> <!--IssueSummary end--> ### Proposal <!-- Use this section to explain the feature and how it will work. It can be helpful to add technical details, design proposals, and links to related epics or issues. --> Replace textbox by a dropdown list for selecting branch when you create a branch from an issue. In our team, we create our branch and our MR directly from our issue. Currently, it is a textbox to set the source branch. Just a basic validation. ![image](/uploads/a9972336d0103f14d135aabd2a16daff/image.png){width=228 height=279} For us, it isn't easy to use this textbox. The goal is to replace it by a dropdown list like in MR for example: ![image](/uploads/d3f47b502163e5e28570634b6d41d5a6/image.png){width=333 height=174} or at minimum, remove the "false" prefilled value or replace it by a "true" prefilled value. When I say "false", I means we can not selected the prefilled value, like isn't really filled. It is a gif to show I can not selected the prefilled value to replace it easily: ![Gitlab_-_branch_selection](/uploads/1da98e0f3f20f27f2141f36cf2344782/Gitlab_-_branch_selection.gif) Current Gitlab version: GitLab Enterprise Edition v17.6.5-ee
issue