Keyframes - Copy/paste WIP

Timeline - Improved sizing, avoid unnecessary scrolling
Timeline - Fix selection rectangle appearing on mousedown

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

@@ -0,0 +1,36 @@
+using System;
+using Artemis.Storage.Entities.Profile;
+
+namespace Artemis.Core
+{
+    /// <summary>
+    ///     Represents a keyframe on a <see cref="ILayerProperty" /> containing a value and a timestamp
+    /// </summary>
+    public interface ILayerPropertyKeyframe
+    {
+        /// <summary>
+        ///     Gets an untyped reference to the layer property of this keyframe
+        /// </summary>
+        ILayerProperty UntypedLayerProperty { get; }
+
+        /// <summary>
+        ///     The position of this keyframe in the timeline
+        /// </summary>
+        TimeSpan Position { get; set; }
+
+        /// <summary>
+        ///     The easing function applied on the value of the keyframe
+        /// </summary>
+        Easings.Functions EasingFunction { get; set; }
+
+        /// <summary>
+        ///     Gets the entity this keyframe uses for persistent storage
+        /// </summary>
+        KeyframeEntity GetKeyframeEntity();
+
+        /// <summary>
+        ///     Removes the keyframe from the layer property
+        /// </summary>
+        void Remove();
+    }
+}

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

@@ -559,12 +559,7 @@ namespace Artemis.Core
             Entity.Value = CoreJson.SerializeObject(BaseValue);
             Entity.KeyframesEnabled = KeyframesEnabled;
             Entity.KeyframeEntities.Clear();
-            Entity.KeyframeEntities.AddRange(Keyframes.Select(k => new KeyframeEntity
-            {
-                Value = CoreJson.SerializeObject(k.Value),
-                Position = k.Position,
-                EasingFunction = (int) k.EasingFunction
-            }));
+            Entity.KeyframeEntities.AddRange(Keyframes.Select(k => k.GetKeyframeEntity()));
 
             Entity.DataBindingEntities.Clear();
             foreach (IDataBinding dataBinding in _dataBindings)

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

@@ -1,11 +1,12 @@
 using System;
+using Artemis.Storage.Entities.Profile;
 
 namespace Artemis.Core
 {
     /// <summary>
     ///     Represents a keyframe on a <see cref="LayerProperty{T}" /> containing a value and a timestamp
     /// </summary>
-    public class LayerPropertyKeyframe<T> : CorePropertyChanged
+    public class LayerPropertyKeyframe<T> : CorePropertyChanged, ILayerPropertyKeyframe
     {
         private LayerProperty<T> _layerProperty;
         private TimeSpan _position;
@@ -45,10 +46,10 @@ namespace Artemis.Core
             set => SetAndNotify(ref _value, value);
         }
 
-
-        /// <summary>
-        ///     The position of this keyframe in the timeline
-        /// </summary>
+        /// <inheritdoc />
+        public ILayerProperty UntypedLayerProperty => LayerProperty;
+        
+        /// <inheritdoc />
         public TimeSpan Position
         {
             get => _position;
@@ -59,14 +60,21 @@ namespace Artemis.Core
             }
         }
 
-        /// <summary>
-        ///     The easing function applied on the value of the keyframe
-        /// </summary>
+        /// <inheritdoc />
         public Easings.Functions EasingFunction { get; set; }
 
-        /// <summary>
-        ///     Removes the keyframe from the layer property
-        /// </summary>
+        /// <inheritdoc />
+        public KeyframeEntity GetKeyframeEntity()
+        {
+            return new KeyframeEntity
+            {
+                Value = CoreJson.SerializeObject(Value),
+                Position = Position,
+                EasingFunction = (int) EasingFunction
+            };
+        }
+
+        /// <inheritdoc />
         public void Remove()
         {
             LayerProperty.RemoveKeyframe(this);