Personally, I think this list is a complete waste of space. Not least because tempi are always in relation to the underlying beat (which is not always a crotchet).
Take for example the other thread on Mozart 40. It is marked Molto Allegro with a cut c meter (an extremely common tempo mark). You cannot enter that using the side panel! The best you can do is choose Allegro (q=140) and change the text and metronome speed. q=140 is obviously too slow and h=140 absurdly fast. Molto can only be applied to relative tempi, but Molto Allegro is not a relative tempo!
And why does the list only include the Italian terms? I’d conjecture that many users wanting this facility are more familiar with Fast Rock rather than Gioioso (which I can’t recall ever coming across. Even Beethoven 9 misses the opportunity)
(Apologies - mini rant over)