Update GUI/operation_icons/Absolute.png, GUI/operation_icons/Addition@3x.png,...

Update GUI/operation_icons/Absolute.png, GUI/operation_icons/Addition@3x.png, GUI/operation_icons/Butterfly.png, GUI/operation_icons/ComplexConjugate.png, GUI/operation_icons/Constant.png, GUI/operation_icons/ConstantMultiplication.png, GUI/operation_icons/CustomOperation.png, GUI/operation_icons/Division.png, GUI/operation_icons/Input.png, GUI/operation_icons/Max.png, GUI/operation_icons/Min.png, GUI/operation_icons/Multiplication.png, GUI/operation_icons/Output.png, GUI/operation_icons/Register.png, GUI/operation_icons/SquareRoot.png, GUI/operation_icons/Subtraction.png, GUI/operation_icons/absolute.png, GUI/operation_icons/addition.png, GUI/operation_icons/butterfly.png, GUI/operation_icons/complexConjugate.png, GUI/operation_icons/constant.png, GUI/operation_icons/constantMultiplication.png, GUI/operation_icons/customOperation.png, GUI/operation_icons/division.png, GUI/operation_icons/input.png, GUI/operation_icons/max.png, GUI/operation_icons/min.png, GUI/operation_icons/multiplication.png, GUI/operation_icons/output.png, GUI/operation_icons/register.png, GUI/operation_icons/squareRoot.png, GUI/operation_icons/subtraction.png files
Deleted GUI/operation_icons/minus.png, GUI/operation_icons/plus.png files