Bug 65243 Build path dialog: Disable 'Add folder' when ex-/inclusion selected
RC1 On the build path dialog it would be better to disable 'Add folder' when ex-/inclusion selected to avoid confusion to what 'Add folder is releated'
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/LibrariesWorkbookPage.java
private CPListElement[] openNewClassFolderDialog(CPListElement existing) {
		String title= (existing == null) ? NewWizardMessages.getString("LibrariesWorkbookPage.NewClassFolderDialog.new.title") : NewWizardMessages.getString("LibrariesWorkbookPage.NewClassFolderDialog.edit.title"); 
		IProject currProject= fCurrJProject.getProject();
		
		NewContainerDialog dialog= new NewContainerDialog(getShell(), title, currProject, getUsedContainers(existing), existing);
		IPath projpath= currProject.getFullPath();
		dialog.setMessage(NewWizardMessages.getFormattedString("LibrariesWorkbookPage.NewClassFolderDialog.description", projpath.toString())); 
		if (dialog.open() == Window.OK) {
			IFolder folder= dialog.getFolder();
			return new CPListElement[] { newCPLibraryElement(folder) };
		}
		return null;
	}
			
			
	private CPListElement[] openClassFolderDialog(CPListElement existing) {
		if (existing == null) {
			IPath[] selected= BuildPathDialogAccess.chooseClassFolderEntries(getShell(), fCurrJProject.getPath(), getUsedContainers(existing));
			if (selected != null) {
				ArrayList res= new ArrayList();
				for (int i= 0; i < selected.length; i++) {
					IPath curr= selected[i];
					IResource resource= fWorkspaceRoot.findMember(curr);
					if (resource instanceof IContainer) {
						res.add(newCPLibraryElement(resource));
					}
				}
				return (CPListElement[]) res.toArray(new CPListElement[res.size()]);
			}
		} else {