activate changes calculation akso when changing the Client amount

Web/templates/termin_configure.html

@@ -434,6 +434,10 @@
         slotLengthInput.addEventListener('input', calculateSlots);
         slotLengthInput.addEventListener('change', calculateSlots);
     }
+    if (clientsperslot) {
+        slotLengthInput.addEventListener('input', calculateSlots);
+        slotLengthInput.addEventListener('change', calculateSlots);
+    }
 
     if (startDateInput.value && endDateInput.value) {
         renderRows();