Mapbox Studio now has universal search, making it fast for designers to find anything they need. You can search for almost anything while designing a map simply by pressing Cmd-K on OSX and Ctrl-K on every other platform. Toggling search will bring up a modal where you can search for:
Need to check out your style in a particular location? Search for the location and zoom quickly.
Instead of scrolling through all your layers, search for the layer.
If you have uploaded your own dataset, you can search for all these layers.