On the dialog box of shortcut,it's a good idea to create a little text area for search the function wish because it's not easy to find one function.
Valid enhancement request. I agree that finding the function to which you want associate a shortcut through many categories may be difficult. That said I guess it is not so easy to implement this search functionality. Best regards. JBF
this already realised, status->WFM
Search for function to assign to keyboard shortcuts implemented in: https://gerrit.libreoffice.org/39356