contextMenu.add( new EditSignalElementPropertiesAction( this.controller, element, aLocationOnScreen ) );
contextMenu.addSeparator();
contextMenu.add( new SetSignalElementVisibilityAction( this.controller, signalElement ) );
if ( signalElement.isDigitalSignal() )
{
contextMenu.add( new RemoveChannelAnnotations( this.controller, signalElement ) );
}