Additional software configuration GUI

Design and implement a nice GUI to select additional software packages to make persistent persistent (possibly among those that have been installed during session).

Proposal:

(preemble) merge the 3 APT persistence options : APT lists cache, APT packages cache, additional software packages
when Alice (logged with administrative privileges with additional software persistence setup) installs a package, she gets a notification "Do you want to reinstall this software package next time you boot Tails?" with a button to add this package to additional software packages
when Alice removes a packages incuded in additional software packages, the package is removed from the list of additional software packages and she gets a notification "The software package was removed from your additional software.".

Team: alan (code), sajolida (ux), kurono (reviewer), segfault (reviewer), u (maybe)

Parent Task: #5551 (closed)

Related issues

Related to #9050 (closed)
Related to #9819 (closed)

Original created by @tails on 5996 (Redmine)

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