Allow EVENTS to be added to Favorites

[ubacher]

Allow EVENTS to be added to Favorites.

This would allow us to quickly go and display a specified EVENT.

(We can add folder and categories - it would be consistent to also have EVENTS, PEOPLE and even Collections.)

[sinus]

+1

[Carlo Didier]

+1

[Mario]

1. You can create favorites for all manual Collections (like dots, pins, bookmarks).
2. IMatch 2021 supports Favorites for Events and Persons.