The visibility state of the code context pane is now persistent between
sessions and the pane does not appear in the shell window.
M CodeContext.py
M EditorWindow.py
M NEWS.txt
M PyShell.py
M config-extensions.def
M configHandler.py
2. Add a <<toggle-code-context>> envent to the [CodeContext] section of
config-extensions.def and also a default-on variable, set to 0.
3. Update the help file to include Code Context.
M CodeContext.py
M config-extensions.def
M help.txt