Layer timeline - Show keyframes of collapsed groups

Profile editor - Don't reload UI elements on undo/redo if there's nothing to undo/redo
Layer properties - Properly show/hide properties

src/Artemis.Core/Models/Profile/LayerProperties/LayerProperty.cs

@@ -284,6 +284,7 @@ namespace Artemis.Core.Models.Profile.LayerProperties
 
         public override void ApplyDefaultValue()
         {
+            BaseValue = DefaultValue;
             CurrentValue = DefaultValue;
         }
     }