I do realize that I can open an .eslintrc in the editor and click the prompt to set style from it, but this is of limited use because it doesn't support "extends."
In my case I extend the AirBnb .eslintrc with a few of my own rules added. My workaround has been to hard-code the entire eslint-config-airbnb-base config, including all the configs it imports, into one giant .eslintrc that I keep on hand. I open it in the project just for the purpose of getting the prompt to use it for code style, then remove it from the project.
Ideally, I'd like to set code style in default preferences from a global file or remote url. But I'd be happy just to be able to do it locally per project.