Move Staff Type Change to another palette (it is not text)
I've observed this before - staff type change is not text, it doesn't belong on the Text palette. It seems to share the most with Breaks & Spacers, but that's an awkwardly named palette as it is. What if we renamed that palette to Layout? Then I think staff type change would fit in nicely. I'm tempted t also suggest that frames could move in there as well.
BTW, let's not forget #276620: Staff type change difficult to add while we're at it.