
I suppose this was also the goal of commit 96e14dc
, but because it was checking
the value of the always-undefined this.sourceActor, it really never worked as
expected.
So, now since we assume that this._sourceActor is always defined just use it
as reference to compute the monitor menu position.
Fixes https://gitlab.gnome.org/GNOME/gnome-shell/issues/1029
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/435