User data for cracks were added

StructureHelperLogics/NdmCalculations/Cracking/UserCrackInputData.cs

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+using StructureHelperCommon.Models.Calculators;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Cracking
+{
+    /// <summary>
+    /// Settings for crack calculations assigned by user
+    /// </summary>
+    public class UserCrackInputData : IInputData
+    {
+        /// <summary>
+        /// Flag of assigning of user value of softening factor
+        /// </summary>
+        public bool SetSofteningFactor {get;set;}
+        /// <summary>
+        /// User value of softening factor, dimensionless
+        /// </summary>
+        public double SofteningFactor {get;set;}
+        /// <summary>
+        /// Flag of assigning of user value of length between cracks
+        /// </summary>
+        public bool SetLengthBetweenCracks {get;set;}
+        /// <summary>
+        /// Length between cracks, m
+        /// </summary>
+        public double LengthBetweenCracks {get;set;}
+        /// <summary>
+        /// Ultimate long-term crack width, m
+        /// </summary>
+        public double UltimateLongCrackWidth { get; set; }
+        /// <summary>
+        /// Ultimate short-term crack width, m
+        /// </summary>
+        public double UltimateShortCrackWidth { get; set; }
+    }
+}