Wire up inventory select to ship state

Also mixed into this commit:

* Use returning drivers where possible
* Make the credits screen returnable via click

internal/ui/noninteractive.go

@@ -83,6 +83,7 @@ func (d *Driver) buildStatic(p *menus.Properties) (*noninteractive, *Widget, err
 
 	widget := &Widget{
 		Locator:       ni.locator,
+		ownClickables: []clickable{ni}, // FIXME: credits background needs to be clickable
 		ownHoverables: []hoverable{ni},
 		ownPaintables: []paintable{ni},
 	}