@Override
		public synchronized void addMouseListener(MouseListener l) {
			if (mouseListenerDelegate == null) {
				super.addMouseListener(l);
			}
			else {
				mouseListenerDelegate.addMouseListener(l);
			}
		}
Need to override the addMouseListener method of the JTree to defer to the delegate mouse
listener. The GTree uses a mouse listener delegate for itself and the JTree it wraps.
When the delegate was installed, it moved all the existing mouse listeners from the JTree
to the delegate. Any additional listeners should also be moved to the delegate.
Otherwise, some Ghidra components that use a convention/pattern to avoid listener
duplication by first removing a listener before adding it, don't work and duplicates get
added.
Ghidra/Framework/Docking/src/main/java/docking/widgets/tree/GTree.java