Nicer loading state #229
Description
When the page has loaded but the JavaScript hasn't (whether slowness or network drop or JS blocked), the page displays all the Vue code that the JavaScript hasn't had a chance to hide yet.
We should at minimum hide this while loading. More complete options could be showing a layout "prediction" so there's less layout jumpiness when the load finishes, or even adding a build step that writes the correct sets into the static HTML file (maybe Vue pre-rendering exists?).