src/vs/workbench/contrib/welcomeOverlay/browser/welcomeOverlay.ts/WelcomeOverlay/show
class WelcomeOverlay:	public show() {
		if (this._overlay.style.display !== 'block') {
			this._overlay.style.display = 'block';
			const workbench = document.querySelector('.monaco-workbench') as HTMLElement;
			workbench.classList.add('blur-background');
			this._overlayVisible.set(true);
			this.updateProblemsKey();
			this.updateActivityBarKeys();
			this._overlay.focus();
		}
	}