SplitButton's arrow-down icon displays incorrectly when the iconClass option is configured.
Regression introduced with 2023.1.314
2023.1.314
and observe the behavior.The SplitButton's arrow-down icon is substituted with the icon class specified in the iconClass configuration option.
The SplitButton's arrow-down icon should not be substituted with the icon class specified in the iconClass configuration option.