Using ctrl-backspace to delete previous word in MATLAB command window

I am using ctrl-backspace in MATLAB editor (MATLAB 2015a) to delete the previous word, but it doesn't work in the command window. I tried changing it in Preferences → Keyboard → Shortcuts, but there doesn't seem to be a way to bind it to Delete Previous Word in the command window. In the attached image, you can see that it is configured to work in the MATLAB Editor, but when you click the down arrow next to where it says MATLAB Editor, it does not display any other options.

This looks like a very common shortcut used by many Windows programs, and it's strange that it is only allowed in the editor. If this is really not allowed, why? Is there a workaround?

I tried to post a picture of this, but the stack overflow says I'm not cool enough yet.