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.UI/Screens/Module/ProfileEditor/LayerProperties/LayerPropertyGroupViewModel.cs

@@ -23,8 +23,10 @@ namespace Artemis.UI.Screens.Module.ProfileEditor.LayerProperties
             TimelinePropertyGroupViewModel = new TimelinePropertyGroupViewModel(this);
 
             PopulateChildren();
+            LayerPropertyGroup.VisibilityChanged += LayerPropertyGroupOnVisibilityChanged;
         }
 
+
         public override bool IsExpanded
         {
             get => LayerPropertyGroup.Layer.IsPropertyGroupExpanded(LayerPropertyGroup);
@@ -68,7 +70,7 @@ namespace Artemis.UI.Screens.Module.ProfileEditor.LayerProperties
         public override List<BaseLayerPropertyKeyframe> GetKeyframes(bool visibleOnly)
         {
             var result = new List<BaseLayerPropertyKeyframe>();
-            if (!IsExpanded)
+            if (visibleOnly && !IsExpanded)
                 return result;
 
             foreach (var layerPropertyBaseViewModel in Children)
@@ -81,6 +83,9 @@ namespace Artemis.UI.Screens.Module.ProfileEditor.LayerProperties
         {
             foreach (var layerPropertyBaseViewModel in Children)
                 layerPropertyBaseViewModel.Dispose();
+
+            LayerPropertyGroup.VisibilityChanged -= LayerPropertyGroupOnVisibilityChanged;
+            TimelinePropertyGroupViewModel.Dispose();
         }
 
         public List<LayerPropertyBaseViewModel> GetAllChildren()
@@ -95,5 +100,10 @@ namespace Artemis.UI.Screens.Module.ProfileEditor.LayerProperties
 
             return result;
         }
+
+        private void LayerPropertyGroupOnVisibilityChanged(object? sender, EventArgs e)
+        {
+            NotifyOfPropertyChange(nameof(IsVisible));
+        }
     }
 }