The Inventory gets tabs, and room for a marketplace
One row of tabs runs across the Inventory, from Skills to Sessions. The kinds that will have a store get a Catalog and an Explore view.
The Inventory now opens on one row of tabs: Skills, Tools, Programs, Developer, Connectors, Plugins, Extensions, Models and Sessions. Each keeps its small count of what is switched on, and the app remembers which tab you were on.
Skills, Developer, Connectors, Plugins and Extensions each get two views. Catalog is what you already have. Explore is where you will find and install new ones; for now it says the marketplace is on its way.