Don't set resource on webviews

Fixes #46217

src/vs/workbench/api/electron-browser/mainThreadWebview.ts

@@ -54,7 +54,7 @@ export class MainThreadWebviews implements MainThreadWebviewsShape {
 		options: vscode.WebviewOptions,
 		extensionFolderPath: string
 	): void {
-		const webviewInput = new WebviewInput(URI.parse('webview://' + handle), title, options, '', {
+		const webviewInput = new WebviewInput(title, options, '', {
 			onMessage: message => this._proxy.$onMessage(handle, message),
 			onDidChangePosition: position => this._proxy.$onDidChangePosition(handle, position),
 			onDispose: () => {

src/vs/workbench/parts/update/electron-browser/releaseNotesEditor.ts

@@ -83,8 +83,7 @@ export class ReleaseNotesManager {
 				this._editorService.openEditor(this._currentReleaseNotes, { preserveFocus: true });
 			}
 		} else {
-			const uri = URI.parse('release-notes:' + version);
-			this._currentReleaseNotes = new WebviewInput(uri, title, { tryRestoreScrollPosition: true, enableFindWidget: true }, html, {
+			this._currentReleaseNotes = new WebviewInput(title, { tryRestoreScrollPosition: true, enableFindWidget: true }, html, {
 				onDidClickLink: uri => this.onDidClickLink(uri),
 				onDispose: () => { this._currentReleaseNotes = undefined; }
 			}, this._partService);

src/vs/workbench/parts/webview/electron-browser/webviewEditor.ts

@@ -141,7 +141,7 @@ export class WebviewEditor extends BaseWebviewEditor {
 			return undefined;
 		}
 
-		if (this.input && this.input.getResource().fsPath !== input.getResource().fsPath) {
+		if (this.input) {
 			(this.input as WebviewInput).releaseWebview(this);
 			this._webview = undefined;
 			this.webviewContent = undefined;

src/vs/workbench/parts/webview/electron-browser/webviewInput.ts

@@ -28,7 +28,6 @@ export interface WebviewInputOptions extends vscode.WebviewOptions {
 export class WebviewInput extends EditorInput {
 	private static handlePool = 0;
 
-	private readonly _resource: URI;
 	private _name: string;
 	private _options: WebviewInputOptions;
 	private _html: string;
@@ -43,7 +42,6 @@ export class WebviewInput extends EditorInput {
 	public readonly extensionFolderPath: URI | undefined;
 
 	constructor(
-		resource: URI,
 		name: string,
 		options: WebviewInputOptions,
 		html: string,
@@ -52,7 +50,6 @@ export class WebviewInput extends EditorInput {
 		extensionFolderPath?: string
 	) {
 		super();
-		this._resource = resource;
 		this._name = name;
 		this._options = options;
 		this._html = html;
@@ -90,20 +87,28 @@ export class WebviewInput extends EditorInput {
 	}
 
 	public getResource(): URI {
-		return this._resource;
+		return null;
 	}
 
 	public getName(): string {
 		return this._name;
 	}
 
+	public getTitle() {
+		return this.getName();
+	}
+
+	public getDescription(): string {
+		return null;
+	}
+
 	public setName(value: string): void {
 		this._name = value;
 		this._onDidChangeLabel.fire();
 	}
 
 	matches(other: IEditorInput): boolean {
-		return other && other instanceof WebviewInput && other.getResource().fsPath === this.getResource().fsPath;
+		return other && other === this;
 	}
 
 	public get position(): Position | undefined {