Added layer properties to core and hooked it up with the UI

Implemented timeline caret scrolling logic
Added special treeview style for the layer properties tree

src/Artemis.UI/Screens/Module/ProfileEditor/LayerProperties/LayerPropertyViewModel.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using System.Collections.Generic;
 using Artemis.Core.Models.Profile;
 using Stylet;
 
@@ -10,13 +6,21 @@ namespace Artemis.UI.Screens.Module.ProfileEditor.LayerProperties
 {
     public class LayerPropertyViewModel : PropertyChangedBase
     {
-        public LayerProperty LayerProperty { get; }
-
-        public LayerPropertyViewModel(LayerProperty layerProperty)
+        public LayerPropertyViewModel(LayerProperty layerProperty, LayerPropertyViewModel parent)
         {
             LayerProperty = layerProperty;
+            Parent = parent;
+            Children = new List<LayerPropertyViewModel>();
+
+            foreach (var child in layerProperty.Children)
+                Children.Add(new LayerPropertyViewModel(child, this));
         }
 
-        public bool IsCollapsed { get; set; }
+        public LayerProperty LayerProperty { get; }
+
+        public LayerPropertyViewModel Parent { get; }
+        public List<LayerPropertyViewModel> Children { get; set; }
+
+        public bool IsExpanded { get; set; }
     }
 }