Dockable Menus (ex: compendium, options)

Just a quick mock up. I would love to be able to drag the "tabs" from one side to another, and use the "open in a new window" feature on handouts and character sheets.This should be somewhat less involved than a new feature as it is integrating things already there. (drag & drop, window, etc.) Also move the maps to a tab. (Its on the right in the mock up.) Thoughts?

Part Two of this would (in my mind) be making the maps tab's object  folders . Sub-folders in the maps would be separate layers. So the GM layer and Token layer would have a thumbnail when you expand it. These sub-folders would be right clickable so you can set options for that layer. Plus members would have access to the dynamic lighting layer. Pro members would likely be able to create custom layers and an FX layer. The reason for this is kind of interesting. It gets tiresome duplicating objects and replacing them one by one. Having map object sotred on a layer means I can copy + paste them with their X, Y coordinates. If they are in a object folder on a map, that folder treats them as a group. I can drag that folder onto the map and move the tokens as a group, and hide and unhide the objects in that folder with a right click. Mock up in G.I.M.P. layer tool. Note that thumbnails update when objects are added.