API ClickSendMailItemButton

__NOTOC__
Drops or picks up an item from the cursor to the Send Mail tab.
 ClickSendMailItemButton(itemIndex [, clearItem])
==Arguments==
:;itemIndex: - The index of the item (1-ATTACHMENTS_MAX_SEND(12))
:;clearItem: - Clear the item already in this slot. (Done by right clicking an item)