Stop the calendar growing a scrollbar on a short window

plugins/notifications/frontend/views/CalendarView.vue

@@ -272,6 +272,23 @@ function formatDate(dateStr) {
   min-height: 620px;
 }
 
+/* Those floors are sized for a full-height display. On a shorter window they
+   add up to more than calc(100vh - 230px) gives - six rows at 110px plus the
+   toolbar overflows a 768px screen - and the page grew a scrollbar to show a
+   month that used to fit. Relax them there: still floored well above the thin
+   strips this was fixing, just not taller than the window. */
+@media (max-height: 899px) {
+  .calendar-container {
+    min-height: 520px;
+  }
+  :deep(.fc) {
+    min-height: 500px;
+  }
+  :deep(.fc-daygrid-day-frame) {
+    min-height: 78px;
+  }
+}
+
 /* The day number was tight against the top edge once the cells grew. */
 :deep(.fc-daygrid-day-top) {
   padding: 2px 4px;