AreaComDialog: Fix property name (MaintainYearFrom)

Elwig/Services/MemberService.cs

@@ -655,7 +655,7 @@ namespace Elwig.Services {
                         KgNr = c.KgNr,
                         GstNr = c.GstNr,
                         RdNr = c.RdNr,
-                        YearFrom = vm.MaintainAreaComYearTo ? c.YearFrom : year,
+                        YearFrom = vm.MaintainAreaComYearFrom ? c.YearFrom : year,
                         YearTo = c.YearTo,
                     }));