More colorschemes for the editor

**Is your feature request related to a problem? Please describe.**
Feature request.
Right now, I have detected two colorschemes (one-dark and monokai) for the editor, I would like to be able to select [more of them](https://codemirror.net/theme/).

**Describe the solution you'd like**
I can change between colorschemes using the `:color` command in **vim mode**. I assume this is an unintended feature :wink: , but, since it is already there, why not go further?

- load more schemes
- set up (in settings? editor status bar?) default color scheme

**Describe alternatives you've considered**
They are in the link above. :smiley:. I have not tried **all** the names, but a lot, and none worked besides _monokai_ (a scheme I like, BTW).

(I'll consider opening another issue for output styling ;-))

Thank you.