Merge pull request #2538 from Nexus-Mods/fix/applychanges-exception

Fix `ApplyChanges` exceptions in the library/loadout

Author: Al12rs

src/NexusMods.App.UI/Controls/TreeDataGrid/TreeDataGridAdapter.cs

@@ -7,6 +7,7 @@
 using NexusMods.App.UI.Extensions;
 using ObservableCollections;
 using R3;
+using System.Reactive.Linq;
 
 namespace NexusMods.App.UI.Controls;
 
@@ -99,9 +100,9 @@ protected TreeDataGridAdapter()
                     return self
                         .GetRootsObservable(viewHierarchical)
                         .OnUI()
+                        .Do(changeSet => self.Roots.ApplyChanges(changeSet))
                         .DisposeMany()
                         .ToObservable()
-                        .Do(self, static (changeSet, self) => self.Roots.ApplyChanges(changeSet))
                         .Select(viewHierarchical, static (_, viewHierarchical) => viewHierarchical);
                 })
                 .Switch()
@@ -119,7 +120,7 @@ private static (ITreeDataGridSelection, Observable<TreeSelectionModelSelectionCh
             SingleSelect = false,
         };
 
-        var selectionObservable = Observable.FromEventHandler<TreeSelectionModelSelectionChangedEventArgs<TModel>>(
+        var selectionObservable = R3.Observable.FromEventHandler<TreeSelectionModelSelectionChangedEventArgs<TModel>>(
             addHandler: handler => selection.SelectionChanged += handler,
             removeHandler: handler => selection.SelectionChanged -= handler
         ).Select(tuple => tuple.e);

src/NexusMods.App.UI/Pages/LibraryPage/NexusModsModPageLibraryItemModel.cs

@@ -120,7 +120,8 @@ public NexusModsModPageLibraryItemModel(IObservable<IChangeSet<NexusModsLibraryI
             FormattedInstalledDate,
             InstallItemCommand,
             IsInstalled,
-            InstallButtonText
+            InstallButtonText,
+            linkedLoadoutItemsDisposable
         );
     }