Adopt new tree in custom views (#76407)

Auto expand initial state of tree nodes is not yet implemented.
Part of #63566

src/vs/base/browser/ui/tree/treeDefaults.ts

@@ -0,0 +1,25 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as nls from 'vs/nls';
+import { Action } from 'vs/base/common/actions';
+import { AsyncDataTree } from 'vs/base/browser/ui/tree/asyncDataTree';
+
+export class CollapseAllAction<TInput, T, TFilterData = void> extends Action {
+
+	constructor(private viewer: AsyncDataTree<TInput, T, TFilterData>, enabled: boolean) {
+		super('vs.tree.collapse', nls.localize('collapse all', "Collapse All"), 'monaco-tree-action collapse-all', enabled);
+	}
+
+	public run(context?: any): Promise<any> {
+		this.viewer.collapseAll();
+		this.viewer.setSelection([]);
+		this.viewer.setFocus([]);
+		this.viewer.domFocus();
+		this.viewer.focusFirst();
+
+		return Promise.resolve();
+	}
+}

src/vs/workbench/api/browser/mainThreadTreeViews.ts

@@ -81,7 +81,10 @@ export class MainThreadTreeViews extends Disposable implements MainThreadTreeVie
 			await treeView.refresh();
 		}
 		for (const parent of parentChain) {
-			await treeView.expand(parent);
+			const parentItem = dataProvider.getItem(parent.handle);
+			if (parentItem) {
+				await treeView.expand(parentItem);
+			}
 		}
 		const item = dataProvider.getItem(itemIn.handle);
 		if (item) {

src/vs/workbench/api/browser/viewsExtensionPoint.ts

@@ -383,7 +383,7 @@ class ViewsExtensionHandler implements IWorkbenchContribution {
 						when: ContextKeyExpr.deserialize(item.when),
 						canToggleVisibility: true,
 						collapsed: this.showCollapsed(container),
-						treeView: this.instantiationService.createInstance(CustomTreeView, item.id, container),
+						treeView: this.instantiationService.createInstance(CustomTreeView, item.id, item.name, container),
 						order: ExtensionIdentifier.equals(extension.description.identifier, container.extensionId) ? index + 1 : undefined,
 						extensionId: extension.description.identifier,
 						originalContainerId: entry.key