Adding target and custom id links doesn't ask for description

[Carlos Pita]

Hi all,

When storing a <<target>> or CUSTOM_ID link with org-store-link and then adding 
it with C-c C-l, org doesn’t ask for a description but automatically inserts an 
ugly description like:

    ~/Desktop/Org/captures.org::target

or:

    ~/Desktop/Org/captures.org::#7EFBCEA1-0D17-45B9-A125-10FE581752F8

The entire path is inserted even when the target itself is simply “target”. 
But, more importantly, no chance to change the description is given to the user.

This behavior is not observed when an ID link is stored, which seems pretty 
inconsistent since there is no clear difference wrt the CUSTOM_ID case.

The inconvenience of this behavior and the inconsistent treatment of ID vs 
CUSTOM_ID makes me believe that this is not intended but a bug (perhaps a 
regression, but I’ve not been using org-mode for long enough to say).

The source of this behavior is in org-store-link:

        ;; If store function actually set `:description' property, use
        ;; it, even if it is nil.  Otherwise, fallback to link value.
        (setq desc (if (plist-member org-store-link-plist :description)
                       (plist-get org-store-link-plist :description)
                     link)))

so that auto-desc is later assumed in org-insert-link, even then the store 
function has provided no description at all!

Best regards
—
Carlos