Split device views/VMs for surface and profile editors

Added support for devices without images to the surface editor

src/Artemis.UI/Converters/NullToVisibilityConverter.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+
+namespace Artemis.UI.Converters
+{
+    public class NullToVisibilityConverter : IValueConverter
+    {
+        private enum Parameters
+        {
+            Normal,
+            Inverted
+        }
+
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            var direction = (Parameters) Enum.Parse(typeof(Parameters), (string) parameter ?? throw new InvalidOperationException());
+            if (direction == Parameters.Normal)
+            {
+                if (value == null)
+                    return Visibility.Hidden;
+                return Visibility.Visible;
+            }
+            if (value == null)
+                return Visibility.Visible;
+            return Visibility.Hidden;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}