counsel.el (counsel-mode): Allow use of describe-prefix-bindings

[justbur]

Add option to let counsel-descbinds override describe-bindings in
counsel-mode.

counsel.el (counsel-descbinds): Make signature match describe-bindings
counsel.el (counsel--descbinds-cands): Adjust for previous change
counsel.el (counsel-mode-override-describe-bindings): New option

[abo-abo]

Isn't it already overridden via counsel-mode-map? Works fine for me.

[justbur]

Try C-c C-h which usually calls describe-prefix-bindings for the prefix C-c. This function calls describe-bindings under the hood which does not get remapped since it's just a straight function call.

[abo-abo]

I get it now, thanks.