Profiles - Abstracted property elements and effect elements

Folders - Added properties to folders
Layer effects - Expanded to folders
Layer effects - Added shape clipping

src/Artemis.Core/Models/Profile/PropertiesProfileElement.cs

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+using System.Collections.Generic;
+using Artemis.Storage.Entities.Profile;
+using SkiaSharp;
+
+namespace Artemis.Core.Models.Profile
+{
+    public abstract class PropertiesProfileElement : ProfileElement
+    {
+        internal abstract PropertiesEntity PropertiesEntity { get; }
+
+        private SKPath _path;
+
+        /// <summary>
+        ///     Gets a copy of the path containing all the LEDs this entity is applied to, any rendering outside the entity Path is
+        ///     clipped.
+        /// </summary>
+        public SKPath Path
+        {
+            get => _path != null ? new SKPath(_path) : null;
+            protected set
+            {
+                _path = value;
+                // I can't really be sure about the performance impact of calling Bounds often but
+                // SkiaSharp calls SkiaApi.sk_path_get_bounds (Handle, &rect); which sounds expensive
+                Bounds = value?.Bounds ?? SKRect.Empty;
+            }
+        }
+
+        /// <summary>
+        ///     The bounds of this entity
+        /// </summary>
+        public SKRect Bounds { get; private set; }
+
+        #region Property group expansion
+
+        protected List<string> _expandedPropertyGroups;
+        
+        public bool IsPropertyGroupExpanded(LayerPropertyGroup layerPropertyGroup)
+        {
+            return _expandedPropertyGroups.Contains(layerPropertyGroup.Path);
+        }
+
+        public void SetPropertyGroupExpanded(LayerPropertyGroup layerPropertyGroup, bool expanded)
+        {
+            if (!expanded && IsPropertyGroupExpanded(layerPropertyGroup))
+                _expandedPropertyGroups.Remove(layerPropertyGroup.Path);
+            else if (expanded && !IsPropertyGroupExpanded(layerPropertyGroup))
+                _expandedPropertyGroups.Add(layerPropertyGroup.Path);
+        }
+
+        #endregion
+
+    }
+}