WebIDE should support syntax highlighting defined in user preferences

Problem to solve

WebIDE should support syntax highlighting defined in user preferences

Further details

I'm using the GitLab Community Edition 10.8.4 2268d0cf
For example, I defined my syntax highlighting theme preferences like that (monokai):

image

And here is the Web IDE page (white):

image

Proposal

What does success look like, and how can we measure that?

It's a success if monokai is in the WebIDE too ;) Like in the files architecture image

Links / references

Edited by Célian