<!--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=25114) </details> <!--IssueSummary end--> ### Summary When selecting a source branch for a merge request it is possible to not be able to delete your text. Enter an existing source branch then change your mind and delete the text using backspace, as you delete characters you come into conflict with the auto search eventually you're unable to delete the first character. Should be selection be changed to a drop down? See giphy attachment for visual. ### Steps to reproduce 1. Create a new issue in a project with at least two branches 2. Navigate to the issue and click the "Create merge request" dropdown 3. Try to input a branch name that is not the default, and click away from the drop down dialog or click to the end 4. Try to clear the dialog with backspace and type in another branch name ### Example Project https://gitlab.com/astrachan-public/merge-request-source-dropdown/issues/1 ### What is the current *bug* behavior? Unable to delete last character - it keeps popping up. ### What is the expected *correct* behavior? selection should be able to be cleared. ### Relevant logs and/or screenshots See attached giphy.  ### Output of checks This bug happens on GitLab.com #### Results of GitLab environment info #### Results of GitLab application Check ### Possible fixes Change behavior of selector, change to a drop down.