A nice addition to the existing RadDock implementation for re-docking floating windows will be the ability to re-dock floating windows to documents if the previous state of the floating window was a document window.
The tabbed document has a floating option since Q1 2014 verstion. Here is the link of the feedback item: http://feedback.telerik.com/Project/154/Feedback/Details/111942-improve-give-floating-option-for-tabbed-document Re-docking of ToolWindows/DocumentWindows from floating windows to document is possible via the context menu.