Saimadhav, since you did not mention a problem with the appearance of the True/False button or the action buttons, which were issues before, I presume they are okay.

S1. For Shell, which does not have Format, alt-O opens Options. The hot key for Format should be changed to 't' so its addition does not diable O_ptions.  I will do this in a separate patch.

S2. For my first patch, I see all 5 files.  For -2, I only see entry for Binding.py.  Odd since the only difference is the better line endings (and date stamps). When I uploaded this, it took about 10 minutes for 'review' to be added. I don't know if that is normal as I never paid attention before. Please post query. 

1. I see the problem with the text entry boxes. I will look for a fix.

2. I have always been bothered by 'Options' -> 'Configure' -> 'Preferences'.  Hotkeys should be 'I' and 'E'.  I think 'Idle' and 'Extensions' might be enough, without 'Configure'.

3. I agree and will delete ... both places.

4. I have not actually looked at the file written, as Ned's review and my edits focused on glitches in the appearance of the dialog itself.  I agree that if nothing is changed, nothing need be written.  If anything is changed, the entire file has to be written.  But I agree that for default extensions in config-extensions.def, only writing the delta, as done with config-main.cfg versus config-main.def, would be good.  This requires noticing which extensions *are* in config-extensions.def.  Sections for extensions only in the user file must be written back in full.  I will look at how saving deltas works for config-main.cfg, but I may want to make this a followup patch.

5. I reused the names from the existing dialogs (config and others), which match the button label and handler name.  These are the capitalized method names I find least bad.  I would also be happy to change them just here or everywhere.  I don't want this to hold up this patch if there is disagreement.

6. Commenting out is temporary, purely for development.