Ignore exceptions when removing temporary files.

Need to investigate why anyway.

RomRepoMgr/ViewModels/ImportRomFolderViewModel.cs

@@ -446,7 +446,18 @@ public sealed partial class ImportRomFolderViewModel : ViewModelBase
                                      if(File.Exists(tmpFile)) File.Delete(tmpFile);
                                  }
                              }
-                             catch(InvalidOperationException) {}
+                                     try
+                                     {
+                                         if(File.Exists(tmpFile)) File.Delete(tmpFile);
+                                     }
+                                     catch(IOException)
+#pragma warning disable PH2098
+                                     {
+                                         // Ignore IO exceptions when deleting temporary files
+                                     }
+#pragma warning restore PH2098
+                                 }
+                             }
                              finally
                              {
                                  Interlocked.Increment(ref _listPosition);