src/vs/workbench/contrib/preferences/browser/keybindingWidgets.ts/DefineKeybindingWidget/layout
class DefineKeybindingWidget:	layout(layout: dom.Dimension): void {
		const top = Math.round((layout.height - DefineKeybindingWidget.HEIGHT) / 2);
		this._domNode.setTop(top);

		const left = Math.round((layout.width - DefineKeybindingWidget.WIDTH) / 2);
		this._domNode.setLeft(left);
	}