Use ShowMsgError for plugin load fail message

Author: Jack251970

Flow.Launcher.Core/Plugin/PluginsLoader.cs

@@ -126,10 +126,9 @@ private static IEnumerable<PluginPair> DotNetPlugins(List<PluginMetadata> source
 
                 _ = Task.Run(() =>
                 {
-                    API.ShowMsgBox($"{errorMessage}{Environment.NewLine}{Environment.NewLine}" +
-                                    $"{errorPluginString}{Environment.NewLine}{Environment.NewLine}" +
-                                    API.GetTranslation("referToLogs"), string.Empty,
-                        MessageBoxButton.OK, MessageBoxImage.Warning);
+                    API.ShowMsgError($"{errorMessage}{Environment.NewLine}{Environment.NewLine}" +
+                        $"{errorPluginString}{Environment.NewLine}{Environment.NewLine}" +
+                        API.GetTranslation("referToLogs"));
                 });
             }