The extension currently assumes that we have the "Activities" button
at the left of the top bar. This is currently true, not only in the
regular session, but also in GNOME classic where the button is hidden
(but still present).
However this is about to change: We will stop taking over the button
from the apps-menu extension, and instead disable "Activities" from
the session mode definition.
Prepare for this by adding the places menu before the application menu
instead of assuming a hardcoded position.
https://gitlab.gnome.org/GNOME/gnome-shell-extensions/merge_requests/69
d1254d9b57