Bug1062326

I've been checking the info about CSS global variables, and realized that they are only implemented to be used through system app, not yet available for other apps.
Also, I couldn't find any other app that is changing them on the fly, so this two variables are not needed globally (for now). So I think now that we can leave them hardcoded here, and maybe find a different way of doing it in the future.

Sorry for having your time wasted :sob: