Add ability to change agenda style

[FrancescoRisso]

I understand that many users did not like the previous agenda style, therefore I appreciate that you are following user feedback. However, I much preferred the previous visual schema, as I found it more elegant, without being less functional. Therefore, would it be possible to add an option to allow the user to manually revert to the previous style? Thanks in advance

[Bri74]

@FrancescoRisso with "previous style" do you mean PoliTO App calendar? Or PoliTO Students previous version calendar?

[FrancescoRisso]

I meant the previous PoliTo Students version