Icons for force result were added

StructureHelperLogics/NdmCalculations/Analyses/ByForces/LimitCurve/LimitCurveResult.cs

@@ -0,0 +1,21 @@
+using StructureHelperCommon.Models.Calculators;
+using StructureHelperCommon.Models.Shapes;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses.ByForces
+{
+    public class LimitCurveResult : IResult
+    {
+        public bool IsValid { get; set; }
+        public string Description { get; set; }
+        public List<IPoint2D> Points { get; set; }
+        public LimitCurveResult()
+        {
+            Points = new List<IPoint2D>();
+        }
+    }
+}