In QuickNav visually differentiate between documents with the same name in different spaces

Should there be multiple documents with the same name presented by a QuickNav search, there is no immediate mechanism to let the user differentiate between these documents (e.g. find out what space they belong to),

CONF-13471 means that should the user be using the mouse and willing to inspect each item individually then they will be able to see in a tooltip the space name for each document. However this mechanism is so slow and unusable that it makes a mockery of the 'Quick' part of the feature name.

Two screenshots are attached. One shows the problem of duplicate documents and the other shows one possible solution where all the duplicates are rolled into one entry with a slide out submenu that will show the spaces each one belongs to.