Update our list of "Favorites" applications

Originally created by @sajolida on #16990 (Redmine)

The “Applications” GNOME extension has a “Favorites” menu. It’s useful as a shortcut to prevent users from diving into submenus most of the time and also as a way of providing an overview of what’s possible to do with Tails to new users.

https://extensions.gnome.org/extension/6/applications-menu/

Our list is pretty old and haven’t changed a lot over time.

As agreed on https://lists.autistici.org/message/20200311.223700.8c31e65f.en.html:

Tor Browser
Configure persistent volume (new)
Tails documentation (new)
Report an Error (new)
Tails Installer (new)
Thunderbird
KeePassXC
Pidgin Internet Messenger
Files

Feature Branch: feature/16990-update-favorites

Related issues

Related to #14544 (closed)
Related to #5521

Edited May 15, 2020 by sajolida

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