Re: [PATCH v3] git-gui: Handle Ctrl + BS/Del in the commit msg

> From: Ismael Luceno <ismael.luceno@tttech-auto.com>
> 
> - Control+BackSpace: Delete word to the left of the cursor.
> - Control+Delete   : Delete word to the right of the cursor.
> 
> Originally introduced by BRIEF and Turbo Vision between 1985 and 1992,
> they were adopted by most CUA-Compliant UIs, including those of: OS/2,
> Windows, Mac OS, Qt, GTK, Open/Libre Office, Gecko, and GNU Emacs.
> 
> In both cases Tk already implements the functionality bound to other key
> combination, so we use that.
> 
> Graphical examples:
> 
> Deleting to the left:
>         v------ pointer
> X_WORD____X
>   ^-----^------ selection
> 
> Deleting to the right:
>   v--------- pointer
> X_WORD_X
>   ^--^------ selection
> 
> Signed-off-by: Ismael Luceno <ismael.luceno@tttech-auto.com>