Scripts - Properly register script with its owner

Scripts UI - Save on close
Scripts UI - Dispose script on removal

src/Artemis.Core/Plugins/ScriptingProviders/Scripts/LayerScript.cs

@@ -11,6 +11,10 @@ namespace Artemis.Core.ScriptingProviders
         protected LayerScript(Layer layer, ScriptConfiguration configuration) : base(configuration)
         {
             Layer = layer;
+            lock (Layer.Scripts)
+            {
+                Layer.Scripts.Add(this);
+            }
         }
 
         /// <summary>

src/Artemis.Core/Plugins/ScriptingProviders/Scripts/ProfileScript.cs

@@ -11,6 +11,10 @@ namespace Artemis.Core.ScriptingProviders
         protected ProfileScript(Profile profile, ScriptConfiguration configuration) : base(configuration)
         {
             Profile = profile;
+            lock (Profile.Scripts)
+            {
+                Profile.Scripts.Add(this);
+            }
         }
 
         /// <summary>

src/Artemis.Core/Plugins/ScriptingProviders/Scripts/PropertyScript.cs

@@ -10,6 +10,10 @@
         protected PropertyScript(ILayerProperty layerProperty, ScriptConfiguration configuration) : base(configuration)
         {
             LayerProperty = layerProperty;
+            lock (LayerProperty.Scripts)
+            {
+                LayerProperty.Scripts.Add(this);
+            }
         }
 
         /// <summary>