After a notification arrives, when the user focuses on element, the
notification never goes away (unless directly interacted with), this was a bug.
displayNotification was never returning the notification handle, which means
that matrix-react-sdk later on had no way to .close it.
Closes#16026
Signed-off-by: Alexandru M Stan <alex@hypertriangle.com>
Alexandru M Stan
35d1c0d980