KubeObjectStore & KubeWatchApi fixes and optimizations (#2063)

* Detach NamespaceStore from KubeWatchApi, proper KubeObjectStore.loadAll (rebase of #2033)

Signed-off-by: Roman <ixrock@gmail.com>

* Watch-api requests optimization (#2066)

* subscribe for watching resources in single request when has admin-like access rights

Signed-off-by: Roman <ixrock@gmail.com>

* responding to comments

Signed-off-by: Roman <ixrock@gmail.com>

* fix unit-tests

Signed-off-by: Roman <ixrock@gmail.com>

* fix: reloading stores when preloading enabled and waitUntilLoaded=false

Signed-off-by: Roman <ixrock@gmail.com>

* mark Cluster.canUseWatchApi() and Cluster.refreshAccessibility() as private

Signed-off-by: Roman <ixrock@gmail.com>

* fix unit test: make public Cluster.canUseWatchApi()

Signed-off-by: Roman <ixrock@gmail.com>

* responding to comments in #2066

Signed-off-by: Roman <ixrock@gmail.com>

src/renderer/components/item-object-list/item-list-layout.tsx

@@ -138,7 +138,7 @@ export class ItemListLayout extends React.Component<ItemListLayoutProps> {
     const { store, dependentStores } = this.props;
     const stores = Array.from(new Set([store, ...dependentStores]));
 
-    stores.forEach(store => store.loadAll());
+    stores.forEach(store => store.loadAll(namespaceStore.getContextNamespaces()));
   }
 
   private filterCallbacks: { [type: string]: ItemsFilter } = {