Profile editor - Refactored a lot of VMs so they clean up nicely

src/Artemis.Core/Models/Profile/LayerProperties/ILayerProperty.cs

@@ -26,7 +26,12 @@ namespace Artemis.Core
         /// <summary>
         ///     Gets the unique path of the property on the layer
         /// </summary>
-        public string Path { get; }
+        string Path { get; }
+
+        /// <summary>
+        /// Gets the type of the property
+        /// </summary>
+        Type PropertyType { get;  }
 
         /// <summary>
         ///     Initializes the layer property

src/Artemis.Core/Models/Profile/LayerProperties/LayerProperty.cs

@@ -39,20 +39,15 @@ namespace Artemis.Core
             _keyframes = new List<LayerPropertyKeyframe<T>>();
         }
 
-        /// <summary>
-        ///     Returns the type of the property
-        /// </summary>
-        public Type GetPropertyType()
-        {
-            return typeof(T);
-        }
-
         /// <inheritdoc />
         public PropertyDescriptionAttribute PropertyDescription { get; internal set; }
 
         /// <inheritdoc />
         public string Path { get; private set; }
 
+        /// <inheritdoc />
+        public Type PropertyType => typeof(T);
+
         /// <inheritdoc />
         public void Update(Timeline timeline)
         {