Implemented layer LED assignment

Added a centralised ProfileEditorSurface for communication between VMs
Prefixed Surface, Device and Led with Artemis to differentiate them better

src/Artemis.UI/Events/MainWindowFocusChangedEvent.cs

@@ -1,8 +1,8 @@
 namespace Artemis.UI.Events
 {
-    public class MainWindowFocusChanged
+    public class MainWindowFocusChangedEvent
     {
-        public MainWindowFocusChanged(bool isFocused)
+        public MainWindowFocusChangedEvent(bool isFocused)
         {
             IsFocused = isFocused;
         }

src/Artemis.UI/Events/ProfileEditorSelectedElementChanged.cs

@@ -1,15 +0,0 @@
-using Artemis.Core.Models.Profile;
-using Artemis.Core.Models.Profile.Abstract;
-
-namespace Artemis.UI.Events
-{
-    public class ProfileEditorSelectedElementChanged
-    {
-        public ProfileEditorSelectedElementChanged(ProfileElement profileElement)
-        {
-            ProfileElement = profileElement;
-        }
-
-        public ProfileElement ProfileElement { get; }
-    }
-}

src/Artemis.UI/Events/ProfileEditorSelectedProfileChanged.cs

@@ -1,14 +0,0 @@
-using Artemis.Core.Models.Profile;
-
-namespace Artemis.UI.Events
-{
-    public class ProfileEditorSelectedProfileChanged
-    {
-        public ProfileEditorSelectedProfileChanged(Profile profile)
-        {
-            Profile = profile;
-        }
-
-        public Profile Profile { get; }
-    }
-}