Removing UWP project.

Wino.Mail.WinUI/Converters/ReverseBooleanConverter.cs

@@ -0,0 +1,27 @@
+using System;
+
+
+#if NET8_0
+using Microsoft.UI.Xaml.Data;
+#else
+using Windows.UI.Xaml.Data;
+#endif
+
+namespace Wino.Converters
+{
+    public class ReverseBooleanConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, string language)
+        {
+            if (value is bool boolval)
+                return !boolval;
+
+            return false;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, string language)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

Wino.Mail.WinUI/Converters/ReverseBooleanToVisibilityConverter.cs

@@ -0,0 +1,26 @@
+using System;
+
+
+#if NET8_0
+using Microsoft.UI.Xaml.Data;
+using Microsoft.UI.Xaml;
+#else
+using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml;
+#endif
+
+namespace Wino.Converters
+{
+    public class ReverseBooleanToVisibilityConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, string language)
+        {
+            return ((bool)value) ? Visibility.Collapsed : Visibility.Visible;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, string language)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}