Also, am I missing some shortcut to close any sub-windows that are added to a Workspace? (besides the little 'x' at the top-right, of course). I'm finding sometimes that I have to scroll the Workspace view to find the 'x' to be able to close them.
So another suggestion... I wonder if clicking middle mouse button (or something similar) anywhere on the titlebar could close it? I tried dragging it off to the side (till it gives a red cross icon), but that does nothing (unless you drag out of the window entirely, then it splits off into a separate popup window).
I guess it's all just part of adapting to the Workspaces & "chained" stuff. Although I'm finding sometimes if I want to quickly tweak something then close that window, it can feel a bit clumsy with the view panning around as more things open.
Probably doesn't help that I'm stuck on a 1600x900 display at the moment & space gets tight unless I hit F12 to hide all the docked doo-dads. Or I can zoom out, but that gets ugly!