I hope CB can put the Watches window in the bottom or can put it wherever bt docked or undocked
What are you meanning? :shock:
You can place the watches dialog (like many others) wherever you want, simply dragging and dropping it's tittle bar on the place you desire. You'll see a shadowed area indicating the places available near where you are placing the mouse pointer.
Regards.
Edit: For example:
(http://suprfile.com/src/1/77s7qlf/cb1-1.png)