fix copy availabilities button functionality. when editing manually, the flag is set back to false;

components/calendar/avcalendar.tsx

@@ -402,6 +402,10 @@ const AvCalendar = ({ publisherId, events, selectedDate }) => {
             // orange-500 from Tailwind CSS
             backgroundColor = '#f56565';
         }
+        if (event.isFromPreviousMonth) {
+            //gray
+            backgroundColor = '#a0aec0';
+        }
         if (event.isActive) {
             switch (event.type) {
                 case 'assignment':