Merge branch 'structured-totp+maxz' into advanced

Aggregates the TOTP credentials into a data structure,
making it easier to define and use the credentials.
Also incorporate backwards movement code from another branch.

Co-authored-by: Max Zettlmeißl <max@zettlmeissl.de>
Tested-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Tested-on-hardware-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
Signed-off-by: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/369
GitHub-Related-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/356