Draws an design time only for adding a new container to a group.
Inheritance: ViewDrawRibbonDesignBase
        private void SyncChildrenToRibbonGroupItems()
        {
            // Remove all child elements
            Clear();

            ContainerToView regenerate = new ContainerToView();

            // Add a view element for each group item
            foreach (KryptonRibbonGroupContainer container in _ribbonGroup.Items)
            {
                ViewBase containerView;

                // Do we already have a view for this container definition
                if (_containerToView.ContainsKey(container))
                {
                    containerView = _containerToView[container];
                }
                else
                {
                    // Ask the container definition to return an appropriate view
                    containerView = container.CreateView(_ribbon, _needPaint);
                }

                // Update the visible state of the item
                containerView.Visible = (container.Visible || _ribbon.InDesignHelperMode);

                // We need to keep this association
                regenerate.Add(container, containerView);

                Add(containerView);
            }

            // When in design time help mode
            if (_ribbon.InDesignHelperMode)
            {
                // Create the design time 'Add Container' first time it is needed
                if (_viewAddContainer == null)
                {
                    _viewAddContainer = new ViewDrawRibbonDesignGroupContainer(_ribbon, _ribbonGroup, _needPaint);
                }

                // Always add at end of the list of tabs
                Add(_viewAddContainer);
            }

            // Use the latest hashtable
            _containerToView = regenerate;
        }