Bravo Brio Restaurant Group Inc. is going private. Shareholders of the Grandview Heights-based restaurant company this week "overwhelmingly approved" the proposed $100 million acquisition of the business by Switzerland-based Spice Private Equity Ltd. The deal is expected to close May 24, at which point shares of Bravo Brio will cease trading. Spice, an affiliate of GP Investments Ltd., first offered the deal at $4.05 a share back in March. A competing offer of $4.78 per share was pitched by Denver-based...