ChartLegendElement is not able to wrap the LegendItems
From Q1 2015 when there are many items in the chart legend a scroll bar will appear so users can scroll through the items. More info in the following feedback item http://feedback.telerik.com/Project/154/Feedback/Details/149848-add-radchartview-when-the-legend-has-many-items-a-scrollbar-should-appear