GitLab

- Improve phrasing
- Remove CSS classes

Currently translated at 17.7% (11 of 62 strings)

Translation: Tails/wiki/src/news/version_3.14.1.*.po
Translate-URL: http://translate.tails.boum.org/projects/tails/wikisrcnewsversion_3141po/pt/

Currently translated at 39.0% (16 of 41 strings)

Translation: Tails/wiki/src/news/version_3.11.*.po
Translate-URL: http://translate.tails.boum.org/projects/tails/wikisrcnewsversion_311po/it/

I forgot to mention this in the release notes for 3.0.
See cb70ac1f to see me removing by mistake the note I had about this.

We used this terminology as a shortcut when we were supporting both USB
sticks and SD cards but now it's almost always superfluous, so let's
talk explicitly about USB stick as much as possible.

This link and the system menu screenshot provided basically the same
information: clarifying the context, so let's stick to the image that
doesn't require people to go to a different page.

Reusing that same image also makes sense as it displays the two buttons
that we are referring to.

  - Rename Tails installer into Tails Installer
  - Say Tails Installer instead of the Tails Installer
  - Talk about "USB stick or SD card", or "Tails device"
  - Device must be of at least 4 GB
  - Mention that installation does not secure delete old data

So they are not repeated in the PO files.