Create a shared project with all Win App common files (8.1 and 10)

Finally use the dependency injected Resource Service

WinAppCommon/Converters/IconToSymbolConverter.cs

@@ -0,0 +1,20 @@
+using System;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Data;
+using ModernKeePass.Domain.Enums;
+
+namespace ModernKeePass.Converters
+{
+    public class IconToSymbolConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, string language)
+        {
+            return Enum.Parse(typeof(Symbol), value.ToString());
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, string language)
+        {
+            return Enum.Parse(typeof(Icon), value.ToString());
+        }
+    }
+}