Bug 172804 [EditorMgmt] Convert new tab behaviour into a tweaklet
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/WorkbenchActionBuilder.java
String stateKey = "platformState"; 
        String prevState = prefs.getString(stateKey);
        String currentState = String.valueOf(Platform.getStateStamp());
        boolean sameState = currentState.equals(prevState);
        if (!sameState) {
        	prefs.putValue(stateKey, currentState);
        }
        
        
        
        String quickStartKey = IDEActionFactory.QUICK_START.getId(); 
        String showQuickStart = prefs.getString(quickStartKey);
        if (sameState && "true".equals(showQuickStart)) { 
            quickStartAction = IDEActionFactory.QUICK_START.create(window);
			register(quickStartAction);
        }
        else if (sameState && "false".equals(showQuickStart)) { 
        	
        }
        else {
        	
    		infos = IDEWorkbenchPlugin.getDefault().getFeatureInfos();
        	boolean found = hasWelcomePage(infos);
            prefs.setValue(quickStartKey, found);
            if (found) {
                quickStartAction = IDEActionFactory.QUICK_START.create(window);
                register(quickStartAction);
	        }