When in the titlebar I tripleclick the name of an object, it selects both the name and the ZID.
I.e. if you go to https://www.wikifunctions.org/view/en/Z10000 and tripleclick on join, it selects "join strings Z10000" (but weirdly not the brackets around the ZID).
It feels more intuitive if it were only selecting the name i.e. "join strings" in this case.