Add QScreen::virtualSiblingAt() and use it in QMenubarPrivate::popupAction

QGuiApplication::screenAt() is documented "If the point maps to more
than one set of virtual siblings, the first match is returned."
But in many cases it's possible to start from a known screen and
consider only its siblings, as when deciding where to open a QMenu
from a QMenuBar: the QMenuBar is already shown on some screen(s),
so the QMenu must be shown on a sibling from that set.  This function
should be useful in other such cases too, hence it might as well
be public API.

Task-number: QTBUG-76162
Change-Id: I83c74b40eb53f56fb285a6074a3dc2c0ea9c570b
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

0 files changed, 0 insertions, 0 deletions