London-based menswear store Charles Tyrwhitt is moving from 437 Madison Ave. to RFR Realty’s 477 Madison, doubling its space in the process. Tyrwhitt signed for 3,800 square at the East 51st Street corner. The deal was handled for the landlord by MONA, a retail brokerage backed by RFR’s Aby Rosen. Cushman & Wakefield acted for the tenant….