- Add icons
- Have a unified header and footer
- Rework the selection process for localization options
- Rename the buttons for the different configuration paths
- Rework the interactions of the persistence passphrase field
- Rework wordings on 1st and 2nd screen
- Improve progress tracker in assistant

Sorry for the non-atomic commit.

We're already pretending it on the list of available website translations.

Let's focus on language rather than nationality.