MS3: Piano roll ed., once hidden behind main, stays there.

(MS3, but true in MS2, too).

The MS3 piano roll editor (PRE) is the greatest advance in music since Equal Temperament! This is too good to be true! I can phrase a performance without kludged portati, crashes, or outboard tools. This is too good to be true! Thanks whoever is responsible. As Einstein said of relativity, "It's about time!"

HOWEVER. When piano-editing, any click on the main (score) window hides the PRE behind it, which is right, but there is no (operative) way of bringing it back forward without interaction with the OS window chooser app. "Piano Roll Editor" from right-click in the main window/score should bring it back, or even ctrl-TAB (this is in Mac Mojave).