@Override
	// overridden to make sure the combo box text is selected
	protected void dialogShown() {
		// make sure the current item is selected
		initializeContents();
	}
Popup up the dialog in the center of the tool.
@param nav the Navigatable
@param addr the address
@param tool the PluginTool
Ghidra/Features/Base/src/main/java/ghidra/app/util/navigation/GoToAddressLabelDialog.java