fix bug - deleted namespace does not get auto unselected (#930)

* fix bug - deleted namespace does not get auto unselected

Signed-off-by: Yangjun Wang <yangjun.wang@wartsila.com>

src/renderer/components/+namespaces/namespace.store.ts

@@ -87,6 +87,11 @@ export class NamespaceStore extends KubeObjectStore<Namespace> {
     super.reset();
     this.contextNs.clear();
   }
+
+  async remove(item: Namespace) {
+    await super.remove(item);
+    this.contextNs.remove(item.getName());
+  }
 }
 
 export const namespaceStore = new NamespaceStore();