Rename consistently Tor Browser
Originally created by @sajolida on #6574 (Redmine)
In our documentation we sometimes refer to our browser as “Tails browser”, “Tor Browser”, “Tor browser”. We should use consistently “Tor Browser” because, it is more acurate, and upstream is ok with that.
The documentation on fingerprinting (“Can I hide the fact that I am using Tails?”) should also be updated with this change in mind, as it often refers to our browser in comparison with the “Tor Browser Bundle”.