I worried my sleeves were too long. The seemingly insignificant concern entered my thoughts as I prepared to moderate a roundtable discussion for this year's Women Who Mean Business honorees at Mulvaney's B&L on Thursday. Due to a last-minute zipper problem, I was wearing a blazer. I rarely wear blazers, and I assumed my questionably fitted sleeves would be a sure giveaway that I was dressing the part of success, rather than experiencing it. After all, it's easy to play dress-up in the professional…