Humanreadable duration search enabled

as i see in mixxx we only support argument without any whitespace.
duration: >2m-3m 20s won't work
duration: >2m-3m20s will work (difference is 'space' between '3m' and '20s')

and this constarint is needed for any Numerical search. But when we are talking about human readable duration search it is a problem. To me "3m 20s" is more natural than "3m20s". Want to hear from others in this regard.

Anyway i have made patch for humanreadable duraton search. which now workes without space using.
h/H - is used as hour indication
m/M - is used as Minute indication
s/S - is used as second indication
use cases:
2m-3m2s
2m-200s
2m-200 (one is humanreadable other one is like before)
2m
2m20s
120-200

any use case i should consider?