code: protected void resetIcons() {
  		for (ViewConfigItem item : viewConfigItems) {
  			RangeConfig config = getRangeConfigForCurrentScale(item.getViewConfig(), mapWidget.getMapModel()
  					.getMapView().getCurrentScale());
  			if (null != config && null != config.getIcon()) {
  				((MenuItem) item.getButton()).setIcon(Geomajas.getDispatcherUrl() + config.getIcon());
  			}
  		}
  
  		if (activeViewConfig != null) {
  			setMasterItem((MenuItem) activeViewConfig.getButton());
  		}
  	}
docs: Reset all icons.