Attorney’s fees — Costs — Prevailing party — Rule 4-3.4(b) of the Rules Regulating the Florida Bar permits a party to pay a fact witness for the witness’s assistance with case and discovery preparation that is directly related to the witness preparing for, attending, or testifying at proceedings — Narrow nature of issue addressed by court emphasized — Because in instant case it is unclear which witness payments were included in the trial court’s cost award, district court’s decision on this issue quashed — Remand with instructions that the case be further remanded to the trial court for further proceedings