Support favourite stations

First off, love love love this mod. I use it constantly!

I had an idea today to make it even more useful: add support for specifying a home base station that adds a dedicated "go home" button to the UI. I have nine pages of stations in my list already, and am constantly making trips back to my main base to pick up supplies. That means I have to click on the search box, type in the home station name, then click the button to go there, every time.

It'd be sweeeeeeeeeeet if there was just a dedicated "home" button right at the top-level of the Factorio UI that I could whack after entering the train to go home.