Ungroup staves/hide extended barlines
My score has a single piano staff, treble clef only. I've removed the lower staff, but the remaining staff still wants to group itself with the instrument below it: the barlines all "span to next staff", and every time I change an instrument the curly bracket joining the staves reappears.
The latter is easy to work around, but I can't find a way to un-extend all the barlines at once that excludes the leftmost barline of each system. Not sure if I just need a fancy selection mode or if there's some way to fix the underlying mismatch, but any help is appreciated.
I've attached a screenshot that illustrates what I want and a minimal score to play around with.