Fix issue with mapping registry (#514)

This caused the getter for the current mapping registry to return null if the user has not selected a registry and is not authorized to save into any registry.

Needs to be fixed properly at some point in #515.

src/store/index.js

@@ -50,6 +50,10 @@ const getters = {
         user: state.auth.user,
       }))
     }
+    if (!registry) {
+      // Fallback to first registry which can save mappings (even if the user is not authorized for it)
+      registry = state.config.registries.find(registry => _.get(registry, "provider.has.mappings.create"))
+    }
     return registry
   },
   /**