public void setFirstNodeSelected() {
		tree.runTask(new SelectFirstNodeTask(tree));
	}
Selects the first child node of the root node.  Use this method to force the tree to have
focus when the dialog is shown, which allows for keyboard navigation.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/datamgr/util/DataTypeChooserDialog.java