Comment 5 for bug 1101185

Decision has been made to drop the internal Diodon hotkey feature and leave the responsibility of register a custom shortcut up to the desktop environment.

You can find more details here how you can do this:
https://esite.ch/2015/07/using-custom-shortcuts-of-de-as-diodon-hotkey/

Depending on the DE you use but <Super>V should work or otherwise it is an issue of the specific DE.