Noteflight can't select multiple staves at a time

Currently, Noteflight does not allow users to select multiple parts in an orchestral score without clicking on each one individually.  This takes ages when you have to repeatedly select dozens of orchestral parts within a conductor's score.  

A simple fix would be to enable functionality of the shift key (e.g. hold shift and click the outermost parts to select all parts in between).  

Would it possible for this to be implemented?