update of status message of REVOKED file

HCL Sametime allows to share files and users can send files while also revoke sending.

In this case, file link till shows to user link to file (while it is revoked) and only after clicking file user may get notification that "file is no longer availabe".


it would be more correct, if users share files, revoked file is also updated in chat. see example bellow. only links to valid files should be active, all revoked files should be properly marked (when sent, when revoked)

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Donald: Hi, where is a boards report?
Goofy: Here it is
Goofy < File sending is revoked by sender.>
Goofy: ah, it is not a last version, please get this one.
Goofy <sends a file please accept file>

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