A law firm secured a record $4.5 million verdict in a DuPage County personal-injury case against Wells Fargo and the company that owns the bank’s property.Bradley M. Cosgrove and Charles R. Haskins, attorneys with Clifford Law Offices P.C., represented Amy Skinger, who was injured in May 2012 when a metal device used to pull the door closed at the bank’s entrance detached and struck her on the head.On Wednesday, a jury in DuPage County Circuit Court found Wells Fargo 80 percent at fault and Cannella NY Square …