[Boa Constr] Shell enhancements part 2

[Patrick K. O'B. <po...@or...>]

I dug a little more into PythonWin because they are also using Scintilla,
and I found that they use a configuration file with the excerpts I've pasted
below. Then I looked for something similar in boa and couldn't find
anything. I looked at PrefsKeys.py, PrefsMSW.py and ShellEditor.py but
didn't see anything that stood out as relevant. I think a keybinding
configuration file would be nice. PythonWin lets you have a configuration
file that is based on another and overrides it (kind of like inheritance).
That way you leave the default bindings file alone. I like that approach. An
example of that is included below as well. Is any of this doable?
Reasonable? Desireable (to anyone else)?
---
[Keys]
# Auto-complete, call-tips, etc.
Alt+/             = <<expand-word>>
Ctrl+Space   = <<expand-word>>
Shift+(           = <<paren-open>>
Shift-)           = <<paren-close>>
Up                = <<check-calltip-cancel>>
Down              = <<check-calltip-cancel>>
Left              = <<check-calltip-cancel>>
Right             = <<check-calltip-cancel>>
.                 = KeyDot

[Keys:Interactive]
# Key bindings specific to the interactive window.
# History for the interactive window
Ctrl+Up           = <<history-previous>>
Ctrl+Down         = <<history-next>>
Enter             = ProcessEnter
Ctrl+Enter        = ProcessEnter
Shift+Enter       = ProcessEnter
Esc               = ProcessEsc
Alt+I             = WindowBack # Toggle back to previous window.
Home              = InteractiveHome # A sample Event defined in this file.
Shift+Home        = InteractiveHomeExtend # A sample Event defined in this
file.

---
Sample custom configuration that provides keybindings like IDLE:

[General]
# We base this configuration on the default config.
# You can list "Based On" as many times as you like
Based On          = default

[Keys]
# Only list keys different to default.
# Note you may wish to rebind some of the default
# Pythonwin keys to "Beep" or "DoNothing"

Alt+L             = LocateSelectedFile
Ctrl+Q            = AppExit

# Other non-default Pythonwin keys
Alt+A             = EditSelectAll
Alt+M             = LocateModule

# Movement
Ctrl+D            = GotoEndOfFile

# Tabs and other indent features
Alt+T            = <<toggle-tabs>>
Ctrl+[            = <<indent-region>>
Ctrl+]            = <<dedent-region>>

[Keys:Interactive]
Alt+P             = <<history-previous>>
Alt+N             = <<history-next>>

---
Patrick K. O'Brien
Orbtech
"I am, therefore I think."