Share notes and possibly even whole categories

[user13v31]

I think it would be helpful to be able to share and co-edit notes and possibly even notes of a specific category with others. For example if used in a working environment (todo-lists, etc) or in a family (shopping lists, plans)...
atm the 'workaround' is to share single files, but it's kind of unhandy especially if i want to share more notes or if the notes change (different shopping lists, a new one every week). Hence the proposal to add a special "shared with"-Category, to be able to define different categories that will be shared with different people.

[stefan-niedermann]

Partially duplicate of #38

[korelstar]

Duplicate of #285

[korelstar]

Please see #285 (comment) for a workaround.