I'm a keyboard freak and don't like to use the mouse a lot and I run into this problem quite a few times:
I can use hotkeys to jump to the debug windows and other panels etc, but I haven't found a
way so far to get the focus back to the code window to continue editing. Basically I have to click in the edit-window
each time.
Knowing NuSphere there is probably a way for this already but I'm afraid I haven't found it yet. Can you help me?

yeah, thanks for trusting us.
but this time I have to say no, yet we have not implemented it.
It's indeed a rather simple thing but we missed that it might be necessary.