src/vs/workbench/contrib/feedback/browser/feedback.ts/FeedbackWidget/onEvent
class FeedbackWidget:	private onEvent(e: Event, activeElement: HTMLElement): void {
		if (e instanceof KeyboardEvent) {
			const keyboardEvent = <KeyboardEvent>e;
			if (keyboardEvent.keyCode === 27) { // Escape
				this.hide();
			}
		}
	}