Replaced FindIndex with IndexOf for adding of assignedunits to the CAD object

[porcej]

After implementation of #timbellomo/Dashboard.Models/issues/6 replaced FindIndex with IndexOf

var unitKey = incident.UnitsAssigned.IndexOf(unit);

[porcej]

Proposed fix:

// 2023-01-27 - Removed the use of IndexOf until such time as *DTO object support IEquivalnt // var unitKey = incident.UnitsAssigned.IndexOf(assignedUnit); var unitKey = incident.UnitsAssigned.findIndex(u => u.RadioName == assignedUnit.RadioName);