Bug#916452: gnome-shell: "Activities" and Dash freeze occasionally on Debian 9.6

[Jeremy Bicha]

Control: severity -1 normal

This kind of issue is often caused by using an incompatible GNOME
Shell extension.

Please try disabling all your GNOME Shell extensions, log out then log
back in and see if that fixes your issue. Or create a new user account
and log in with that account.

Please don't use a higher severity for your bug reports than is
appropriate. See https://www.debian.org/Bugs/Developer#severities

Thanks,
Jeremy Bicha