Allow Most Recent Files to be disabled

[scottmckendry]

I really like the hyper layout, especially the weekday header - a very nice touch. However, I was disappointed to find out that I could not disable the most recent files (mru) section.

I wanted to do something relatively minimal like the screenshot below:

My suggestion is to add a new config option mru.enable similar to what we already have with project.enable. I've created a fork where I've cobbled together a solution for this but it feels a bit hacky and not something I'd open a pull request for.

Perhaps someone with a better understanding of the code base can do a better job than I can!