How could I change font used in gitlab.com's issue editor

Describe your question in as much detail as possible:

  • What are you seeing, and how does it differ from what you expect to see?
    issue editor’s font has been changed, and it make my content get rubbed
    (language: vietnamese)

  • Consider including screenshots, error messages, and/or other helpful visuals

  • What version are you on (Hint: /help) ? and are you using self-managed or gitlab.com?
    I’m using gitlab.com

  • What troubleshooting steps have you already taken? Can you link to any docs or other resources so we know where you have been?

I’ve tried to search in preferences but nothing help, there is no option to set font used in issue editor.

  • How could I config my gitlab.com’s issue editor to showed by Consolas? I’m using Windows 10