Marketplace is now one click away from models, sceneries and styles

The marketplace tile now sits at the end of every list on all three screens and in every empty state, so finding ready-made content no longer depends on which tab you happen to be on.

The marketplace tile introduced on the Models screen reached one screen and skipped tabs within it. Sceneries and Styles work the same way and each have their own marketplace, yet offered no tile at all — and on Models it disappeared as soon as the Marketplace tab had something in it.

The tile now appears as the last cell of every list on models, sceneries and styles, on every tab, and in every empty state. Each screen points at its own marketplace and names its own content. The button in the header stays where it was.

One more fix along the way: on the Sceneries screen, a search with no results used to render an empty grid instead of the "nothing found" message.