Deferred delete

For each deleted note, the count of notes in the note pad is decremented by one. As was the case for a single note delete request, the physical deletion of a note and decrement of the note count could be deferred in cases where XCF needs to preserve the maximum tag value of the deleted note. Deferred deletes can occur with note pads that require lifetime tracking of maximum tag values. When applicable, the XCF Note Pad Services preserve the maximum tag value before processing the delete notes request so as to minimize the possibility that the deletion of a note is deferred.