Tor Browser Script can't be launched from the Linux desktop

In Unity (Ubuntu) and GNOME 3, it is not possible to start Tor Browser through the graphical file manager. When double-clicking on start-tor-browser, an editor will pop-up by default.

One user suggested through the help desk that we ship a .desktop file. In GNOME 3, users are prompted to confirm because it's an unknown application, but this is still much better.

Here's a minimal .desktop that should probably be enhanced with comments, translations, icons:

[Desktop Entry]
Type=Application
Name=Tor Browser
Terminal=false
Exec=sh -c '"$(dirname "$*")"/start-tor-browser' dummy %k

Also inspired by https://unix.stackexchange.com/q/144422

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