[DELEGATION] Edit attendance and events, delete event for someone (#553)

* [#523] added way to manage attendance for delegated calendars

* [DELEGATION] #523 & #524 changed eventURL calculation for delegated events to have the rigth one

* [#524] added drag and drop authorisation to delegated event

* [#524] added tests

* [#524] support for the permission access

* [#524] no edit when delegated event is not public

__test__/features/Calendars/TimezoneInGrid.test.tsx

@@ -27,8 +27,7 @@ describe("Calendar - Timezone Integration", () => {
           name: "Test Calendar",
           description: "",
           color: "#33B679",
-          owner: "user1",
-          ownerEmails: ["test@test.com"],
+          owner: { firstname: "user1", emails: ["test@test.com"] },
           visibility: "public",
           events: {},
         },
@@ -174,8 +173,7 @@ describe("EventDisplayPreview - Timezone Display", () => {
           id: "user1/cal1",
           name: "Test Calendar",
           color: "#33B679",
-          owner: "user1",
-          ownerEmails: ["test@test.com"],
+          owner: { firstname: "user1", emails: ["test@test.com"] },
           visibility: "public",
           events: {
             event1: baseEvent,