add.setIcon(StandardIconsProvider.STANDARD_ICONS.plusRound());
add.setEnabled(editable);
toolBar.add(add);
if (URL.getServerBaseURL().startsWith("http://localhost:")
|| URL.getServerBaseURL().startsWith("https://localhost:")) {
toolBar.add(new FillToolItem());
LabelField warningLabel = new LabelField(Messages.get(
"label.urlmapping.inactiveOnLocalhost",
"URL mapping is inactive for server-name: localhost"));
warningLabel.setStyleAttribute("color", "red");
toolBar.add(warningLabel);