Fix error in mapping generator

[crazycat256]

What's new

Nothing

What's fixed

This error:

java.lang.IllegalArgumentException: Children: duplicate children added: parent = Grid hgap=5.0, vgap=5.0, alignment=TOP_LEFT
	at javafx.graphics@22.0.1/javafx.scene.Parent$3.onProposedChange(Parent.java:562)
	at javafx.base@22.0.1/com.sun.javafx.collections.VetoableListDecorator.addAll(VetoableListDecorator.java:238)
	at javafx.base@22.0.1/com.sun.javafx.collections.VetoableListDecorator.addAll(VetoableListDecorator.java:105)
	at javafx.graphics@22.0.1/javafx.scene.layout.GridPane.addRow(GridPane.java:1032)
	at software.coley.recaf.ui.pane.MappingGeneratorPane$IncludeName.fillConfigurator(MappingGeneratorPane.java:791)
	at software.coley.recaf.ui.pane.MappingGeneratorPane$FilterWithConfigNode.getConfigurator(MappingGeneratorPane.java:1006)
	at software.coley.recaf.ui.pane.MappingGeneratorPane.showConfigurator(MappingGeneratorPane.java:436)
	at software.coley.recaf.ui.pane.MappingGeneratorPane.lambda$createFilterDisplay$10(MappingGeneratorPane.java:367)
	at software.coley.recaf.ui.control.ActionButton.wrap(ActionButton.java:147)
	at software.coley.recaf.ui.control.ActionButton.lambda$new$2(ActionButton.java:67)

It occurs when you try to add an "Include names" filter in the mapping generator

[Col-E]

Copy paste strikes again 😢