Fix all day events bleeding over to following day:

* Google defines all day as "Midnight" to "Midnight + 1 day"
* Subtract 1 minute from the end time.

frontend/src/components/CalendarQalendar.vue

@@ -187,7 +187,7 @@ const calendarEvents = computed(() => {
           ? start.format(dateFormatStrings.qalendarFullDay)
           : start.format(dateFormatStrings.qalendar),
         end: event.all_day
-          ? end.format(dateFormatStrings.qalendarFullDay)
+          ? end.subtract(1, 'minute').format(dateFormatStrings.qalendarFullDay)
           : end.format(dateFormatStrings.qalendar),
       },
       description: event.description,