Disable the topIcons GNOME Shell extension in one Tails release
As suggested on #8310 (comment 94049), in order to learn how much our users rely on this extension and — transitively — on OpenPGP Applet, we should disable this extension for one Tails release. People could still enable it again with 1 command line:
Besides, the OpenPGP Applet will still be available in the bottom-left semi-hidden sysAtray.
:sajolida: is watching this
Feature Branch: bugfix/16608-disable-topicons
Parent Task: #8309