Fix microsoft#180856. Enter to replace match (microsoft#181296)

Author: rebornix

src/vs/workbench/contrib/notebook/browser/contrib/find/notebookFindWidget.ts

@@ -91,6 +91,7 @@ class NotebookFindWidget extends SimpleFindReplaceWidget implements INotebookEdi
 		DOM.append(this._notebookEditor.getDomNode(), this.getDomNode());
 		this._findWidgetFocused = KEYBINDING_CONTEXT_NOTEBOOK_FIND_WIDGET_FOCUSED.bindTo(contextKeyService);
 		this._register(this._findInput.onKeyDown((e) => this._onFindInputKeyDown(e)));
+		this._register(this._replaceInput.onKeyDown((e) => this._onReplaceInputKeyDown(e)));
 
 		this._register(this._state.onFindReplaceStateChange((e) => {
 			this.onInputChanged();
@@ -134,6 +135,14 @@ class NotebookFindWidget extends SimpleFindReplaceWidget implements INotebookEdi
 		}
 	}
 
+	private _onReplaceInputKeyDown(e: IKeyboardEvent): void {
+		if (e.equals(KeyCode.Enter)) {
+			this.replaceOne();
+			e.preventDefault();
+			return;
+		}
+	}
+
 	protected onInputChanged(): boolean {
 		this._state.change({ searchString: this.inputValue }, false);
 		// this._findModel.research();