Binary package “xdg-user-dirs-gtk” in ubuntu bionic

tool to manage well known user directories (Gtk extension)

 xdg-user-dirs is a tool to help manage "well known" user directories
 like the desktop folder and the music folder. It also handles
 localization (i.e. translation) of the filenames.
 .
 This extension sets the Gtk bookmark file and tracks changes of the locale
 to notify the user on login about changed directory names.