restrict cross-vd activation to in-client distribution
Review Request #127153 - Created Feb. 22, 2016 and submitted
QDialog or at least QMessageBox does this and I doubt Lubos' idea was to "allow focus stealing if the client nags enough" - switching the VD is a major interrupt and prevented when a new window shows up. It should not be possible to stomp on ground and then receive focus - notably not on the other desktop. I assume the original idea was to let clients distribute focus *inside* across virtual desktops, maybe also permit when no client was active, but hardly otherwise.