UI: Fix negative space savings in XCI trimmer

src/Ryujinx/UI/Helpers/XCITrimmerFileSpaceSavingsConverter.cs

@@ -1,6 +1,7 @@
 using Avalonia;
 using Avalonia.Data;
 using Avalonia.Data.Converters;
+using Gommon;
 using Ryujinx.Ava.Common.Locale;
 using Ryujinx.UI.Common.Models;
 using System;
@@ -32,11 +33,11 @@ namespace Ryujinx.Ava.UI.Helpers
 
             if (app.CurrentSavingsB < app.PotentialSavingsB)
             {
-                return LocaleManager.Instance.UpdateAndGetDynamicValue(LocaleKeys.TitleXCICanSaveLabel, (app.PotentialSavingsB - app.CurrentSavingsB) / _bytesPerMB);
+                return LocaleManager.Instance.UpdateAndGetDynamicValue(LocaleKeys.TitleXCICanSaveLabel, ((app.PotentialSavingsB - app.CurrentSavingsB) / _bytesPerMB).CoerceAtLeast(0));
             }
             else
             {
-                return LocaleManager.Instance.UpdateAndGetDynamicValue(LocaleKeys.TitleXCISavingLabel, app.CurrentSavingsB / _bytesPerMB);
+                return LocaleManager.Instance.UpdateAndGetDynamicValue(LocaleKeys.TitleXCISavingLabel, (app.CurrentSavingsB / _bytesPerMB).CoerceAtLeast(0));
             }
         }
 

src/Ryujinx/UI/ViewModels/XCITrimmerViewModel.cs

@@ -364,7 +364,7 @@ namespace Ryujinx.Ava.UI.ViewModels
                     value = _processingApplication.Value with { PercentageProgress = null };
 
                 if (value.HasValue)
-                    _displayedXCIFiles.ReplaceWith(value.Value);
+                    _displayedXCIFiles.ReplaceWith(value);
 
                 _processingApplication = value;
                 OnPropertyChanged();