src/vs/platform/windows/electron-main/window.ts/CodeWindow/setSimpleFullScreen
class CodeWindow:	private setSimpleFullScreen(fullscreen: boolean): void {
		if (this._win.isFullScreen()) {
			this._win.setFullScreen(false);
		}

		this._win.setSimpleFullScreen(fullscreen);
		this._win.webContents.focus(); // workaround issue where focus is not going into window
	}