Open multiple staves in Piano roll

Hi.
The piano roll feature in Musescore is very nice. It let us make adjustments without affecting notation. However it only works with a staff at a time. It would be very nice if it could also open the notes of all selected staves when we select more than one staff. It would be very useful in several situations (e.g. arpeggiating notes played with both hands in keyboard music).
Can you, please, implement the possibility of opening multiple staves in Piano roll?