Add ctrl + arrows key bindings for readline

[ssdaniel24]

Subj. It would be very useful when renaming filenames, and you want to jump left to edit filename only without extension.

Yes, you can jump word-by-word with Alt+f and Alt+b. But you have to change keyboard layout to use them, if you use more then one — english.

[jarun]

Handling Ctrl + Arrow adds a huge amount of code. I tried that once. So skipped.

[ssdaniel24]

Can you show patch for it?

[jarun]

No, I don't have it anymore.