tournament result reworked (UI and code)

Check for duplicate (case) in player's name.

LaDOSE.Src/LaDOSE.DesktopApp/Utils/CustomEqualityCompare.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+
+namespace LaDOSE.DesktopApp.Utils
+{
+    public static class CustomListExtension
+    {
+        public sealed class EqualityComparer<T> : IEqualityComparer<T> where T : class
+        {
+            private readonly Func<T, T, bool> _compare;
+
+            public EqualityComparer(Func<T, T, bool> c)
+            {
+                _compare = c;
+            }
+
+            public bool Equals(T x, T y)
+            {
+                return _compare(x, y);
+            }
+
+            public int GetHashCode(T obj)
+            {
+                return 0;
+            }
+        }
+    }
+}