In either case, if there is a shortcut clash then I have no way to use the Nautilus one. So I would like to have an option, to cancel focus on code pane with a keyboard.

You can move the focus
Cmd+G,Cmd+M -> focus methodlist
Cmd+G,Cmd+C -> focus classlist

At least this worked with the old code text pane

That's my point, I can't.

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The normal shortcut for switching focus in Morphic should work:

Ctrl+Tab, Ctrl+Shift+Tab

Ctrl+Tab seems to work somewhat but is weird.

If I press it once the focus is received by the line/column counter in the bottom bar (this is pre-QualityAssistant Pharo 5). From there I can execute some nautilus shortcuts (like opening new nautilus window)

But if I want for example get to classlist, I have to press Ctrl+Tab six times to get to package list and only from there cmd+G,cmd+C works.

And Ctrl+Shift+Tab doesn't work at all.

Unrelated:

I found ctrl+alt+tab shortcut that cycles thru all open windows with live preview... :)

(but if the focus is received by nautilus window the shortcut stops working again)

Hmm... this seems more problematic than originally anticipated, I will have to take a deeper look since apparently you can't reproduce it.

Peter