Profile editor service - Make keyframe selection an editor concern

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

@@ -1,4 +1,6 @@
 using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using Artemis.Storage.Entities.Profile;
 
 namespace Artemis.Core
@@ -52,6 +54,11 @@ namespace Artemis.Core
         /// </summary>
         string Path { get; }
 
+        /// <summary>
+        ///     Gets a read-only list of all the keyframes on this layer property
+        /// </summary>
+        ReadOnlyCollection<ILayerPropertyKeyframe> UntypedKeyframes { get; }
+
         /// <summary>
         ///     Gets the type of the property
         /// </summary>

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

@@ -258,6 +258,9 @@ namespace Artemis.Core
         /// </summary>
         public ReadOnlyCollection<LayerPropertyKeyframe<T>> Keyframes { get; }
 
+        /// <inheritdoc />
+        public ReadOnlyCollection<ILayerPropertyKeyframe> UntypedKeyframes => new(Keyframes.Cast<ILayerPropertyKeyframe>().ToList());
+
         /// <summary>
         ///     Gets the current keyframe in the timeline according to the current progress
         /// </summary>