Profile elements - Simplified class hierarchy

Profile editor - Seperated event types and avoid a lot of type checking
Profile editor - Avoid changing profiles/layers if the new equals the old
Color picker - Fixed binding error
Profile tree - Select first element by default
Profile editor - Adjusted initialization order

src/Artemis.UI.Shared/Events/ProfileEventArgs.cs

@@ -0,0 +1,22 @@
+using System;
+using Artemis.Core.Models.Profile;
+
+namespace Artemis.UI.Shared.Events
+{
+    public class ProfileEventArgs : EventArgs
+    {
+        public ProfileEventArgs(Profile profile)
+        {
+            Profile = profile;
+        }
+
+        public ProfileEventArgs(Profile profile, Profile previousProfile)
+        {
+            Profile = profile;
+            PreviousProfile = previousProfile;
+        }
+
+        public Profile Profile { get; }
+        public Profile PreviousProfile { get; }
+    }
+}