I need to modify Bug 9173. So, I am removing a few changes from 13252
to make both the modifications and the rebase easier.

This commit adds TorProject as the vendor of Tor Browser.
This should be visible both in the Windows binaries, and will be used
to create the profile directory if we disable the portable mode.

Bug 20497: Make it possible to disable portable mode

9173 is the patch that enables portable mode for Tor Browser.
We modified it to make it optional, but it still used to remove a few
important parts that made it compulsory to define a profile directory
in the application.ini (through the mozconfig).

This commit restores these parts, and makes it hopefully possible to
disable portable mode without filling the home directory with TBB
files.
A few parts are then disabled in a following commit, since they are
TBB-legacy behavior, but we might not want them for base-browser and
for privacy-browser.

Also, this commit changes the configure flag from
--with-relative-profile-directory to --with-relative-data-dir, because
the data directories can contain the profile and the local data such as
caches, not only the profile.
Still, we are assuming we are using the same data directory for the
profile and for the caches, which is not the case on Windows (where the
profile is roaming, and the caches are local) and on Linux (where the
profile is in the home, and the cache is in ~/.cache).

Change relative-profile-directory with relative-data-dir.

Bug 20497: Make it possible to use Tor Browser in non-portable mode

Add back some legacy Tor Browser-specific behaviors that we restored in
9173.

Bug 41535: Remove the old, unused and undocumented "-invisible" macOS CLI flag