Crash in checkpoint manager when right-clicking on a LoRA

[halr9000]

What happened?

1. Go to checkpoint manager
2. Observe a LoRA had a new version
3. Download new version of that LoRA to same sub-folder (eg lora\flux)
4. Right-click on outdated model
5. Crash

I have been able to reproduce this, but not every time.

Exception Details

Exception

ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')

Sentry ID

73e3c3c3

Stack Trace

   at Avalonia.Layout.FlowLayoutAlgorithm.Measure(Size availableSize, VirtualizingLayoutContext context, Boolean isWrapping, Double minItemSpacing, Double lineSpacing, Int32 maxItemsPerLine, ScrollOrientation orientation, Boolean disableVirtualization, String layoutId)
   at Avalonia.Layout.UniformGridLayout.MeasureOverride(VirtualizingLayoutContext context, Size availableSize)
   at Avalonia.Controls.ItemsRepeater.MeasureOverride(Size availableSize)
   at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize)
   at Avalonia.Layout.Layoutable.Measure(Size availableSize)
   at Avalonia.Layout.LayoutManager.Measure(Layoutable control)
   at Avalonia.Layout.LayoutManager.Measure(Layoutable control)
   at Avalonia.Layout.LayoutManager.Measure(Layoutable control)
   at Avalonia.Layout.LayoutManager.Measure(Layoutable control)
   at Avalonia.Layout.LayoutManager.Measure(Layoutable control)
   at Avalonia.Layout.LayoutManager.Measure(Layoutable control)
   at Avalonia.Layout.LayoutManager.Measure(Layoutable control)
   at Avalonia.Layout.LayoutManager.ExecuteLayoutPass()
   at Avalonia.Media.MediaContext.FireInvokeOnRenderCallbacks()
   at Avalonia.Media.MediaContext.RenderCore()
   at Avalonia.Media.MediaContext.Render()
   at Avalonia.Threading.DispatcherOperation.InvokeCore()
   at Avalonia.Threading.DispatcherOperation.Execute()
   at Avalonia.Threading.Dispatcher.ExecuteJob(DispatcherOperation job)
   at Avalonia.Threading.Dispatcher.ExecuteJobsCore(Boolean fromExplicitBackgroundProcessingCallback)
   at Avalonia.Threading.Dispatcher.Signaled()
   at Avalonia.Win32.Win32Platform.WndProc(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam)
   at Avalonia.Win32.Interop.UnmanagedMethods.DispatchMessage(MSG& lpmsg)
   at Avalonia.Win32.Win32DispatcherImpl.RunLoop(CancellationToken cancellationToken)
   at Avalonia.Threading.DispatcherFrame.Run(IControlledDispatcherImpl impl)
   at Avalonia.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at Avalonia.Threading.Dispatcher.MainLoop(CancellationToken cancellationToken)
   at Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.Start(String[] args)
   at StabilityMatrix.Avalonia.Program.Main(String[] args)```


### Version

2.12.3

### What Operating System are you using?

Windows