normalize option name

Author: amunger

src/vs/workbench/contrib/notebook/browser/view/renderers/backLayerWebView.ts

@@ -1609,7 +1609,7 @@ export class BackLayerWebView<T extends ICommonCellInfo> extends Themable {
 		this.webview?.focus();
 	}
 
-	focusOutput(cellOrOutputId: string, backupId: string | undefined, viewFocused: boolean) {
+	focusOutput(cellOrOutputId: string, alternateId: string | undefined, viewFocused: boolean) {
 		if (this._disposed) {
 			return;
 		}
@@ -1621,7 +1621,7 @@ export class BackLayerWebView<T extends ICommonCellInfo> extends Themable {
 		this._sendMessageToWebview({
 			type: 'focus-output',
 			cellOrOutputId: cellOrOutputId,
-			backupId: backupId
+			alternateId: alternateId
 		});
 	}
 

src/vs/workbench/contrib/notebook/browser/view/renderers/webviewMessages.ts

@@ -275,7 +275,7 @@ export interface ICopyImageMessage {
 export interface IFocusOutputMessage {
 	readonly type: 'focus-output';
 	readonly cellOrOutputId: string;
-	readonly backupId?: string;
+	readonly alternateId?: string;
 }
 
 export interface IAckOutputHeight {

src/vs/workbench/contrib/notebook/browser/view/renderers/webviewPreloads.ts

@@ -474,9 +474,9 @@ async function webviewPreloads(ctx: PreloadContext) {
 		});
 	};
 
-	function focusFirstFocusableOrContainerInOutput(cellOrOutputId: string, backupId?: string) {
+	function focusFirstFocusableOrContainerInOutput(cellOrOutputId: string, alternateId?: string) {
 		const cellOutputContainer = document.getElementById(cellOrOutputId) ??
-			backupId ? document.getElementById(backupId!) : undefined;
+			alternateId ? document.getElementById(alternateId!) : undefined;
 		if (cellOutputContainer) {
 			if (cellOutputContainer.contains(document.activeElement)) {
 				return;
@@ -1525,7 +1525,7 @@ async function webviewPreloads(ctx: PreloadContext) {
 				break;
 			}
 			case 'focus-output':
-				focusFirstFocusableOrContainerInOutput(event.data.cellOrOutputId, event.data.backupId);
+				focusFirstFocusableOrContainerInOutput(event.data.cellOrOutputId, event.data.alternateId);
 				break;
 			case 'decorations': {
 				let outputContainer = document.getElementById(event.data.cellId);