fix(calendar): produce correct JMAP patch when removing recurrence rules

Include recurrenceRules, recurrenceOverrides, and excludedRecurrenceRules
in the update patch when clearing recurrence from an event. Also fix
"this and future" scope overriding user's recurrence changes.

Fixes #14

components/calendar/event-modal.tsx

@@ -237,6 +237,8 @@ export function EventModal({
           relativeTo: null,
         },
       };
+    } else if (isEdit && event?.locations && Object.keys(event.locations).length > 0) {
+      data.locations = null;
     }
 
     if (recurrence !== "none") {
@@ -259,6 +261,10 @@ export function EventModal({
         count: null,
         until: null,
       }];
+    } else if (isEdit && event?.recurrenceRules?.length) {
+      data.recurrenceRules = null;
+      if (event.recurrenceOverrides) data.recurrenceOverrides = null;
+      if (event.excludedRecurrenceRules) data.excludedRecurrenceRules = null;
     }
 
     if (alert !== "none") {
@@ -272,6 +278,8 @@ export function EventModal({
           relatedTo: null,
         },
       };
+    } else if (isEdit && event?.alerts && Object.keys(event.alerts).length > 0) {
+      data.alerts = null;
     }
 
     if (attendees.length > 0 && currentUserEmails.length > 0) {