Make it possible to set fixed WIdth/Height sizes to the PaneGroups. In the current version setting the Width/Height properties of the PaneGroup leads to incorrect placement of the groups while docked in the control. Available in the 2017 R2 Release. More information you can find here: http://docs.telerik.com/devtools/wpf/controls/raddocking/features/pane-groups#set-minmaxwidth-and-minmaxheight