private synchronized void updateProgressPanel() {
		if (showingProgress) {
			progressBarPanel.add(progressBar, BorderLayout.NORTH);
		}
		else {
			progressBarPanel.remove(progressBar);
		}
	}
Sets the visibility of the progress icon

@param visible if true, display the progress icon
Ghidra/Framework/Docking/src/main/java/ghidra/util/task/TaskMonitorComponent.java