619de9d5ee
The last commit improved the heuristics for detecting network mounts,
but at the price of potentially blocking the shell. Avoid that drawback
by making the code in question async.
https://gitlab.gnome.org/GNOME/gnome-shell-extensions/issues/53
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/merge_requests/27>
(cherry picked from commit 519269be9d)