cancelButton = createActionButton(new CancelAction(), false);
tabsButton = new JToggleButton(new ChangeToTabsAction());
tabsButton.setPreferredSize(UISupport.TOOLBAR_BUTTON_DIMENSION);
splitButton = createActionButton(new ChangeSplitPaneOrientationAction(requestSplitPane), true);
addAssertionButton = UISupport.createToolbarButton(new AddAssertionAction(amfRequestTestStep));
addAssertionButton.setEnabled(true);
requestTabs = new JTabbedPane();
requestTabs.setTabPlacement(JTabbedPane.LEFT);
requestTabs.addChangeListener(new ChangeListener() {