Insurance — Homeowners — Appraisal — Trial court applied incorrect standard in determining whether insurer waived its right to appraisal by mistakenly concluding that an insurer could not invoke appraisal until coverage was determined — While an insured cannot seek appraisal until coverage is determined, an insurer may invoke appraisal and still retain a coverage defense — Remand for reconsideration of whether insurer’s actions amount to a waiver of right to appraisal