Calendar Event improvement

[kmk]

Please add a Check-in button that can be actived by moderators or who is invited in the event.

I was use the event to register customer who have to come to my store to take out something, now in the page appear all customers in what time have to come to my store, what would like to do is a moderator or the user of the event invited can make a Check-in action. Then I will know who is invited and who is already come.

Maybe ''Event completed'' instead Check-in

Or add this ''ask user action'' feature as a moderator tool that can be used in all suite environments.

[kmk]

This user action should be approved by moderator as action validated.