Grants on sequences via Grant Wizard

Hi all,
I've noticed Grant Wizard (schema node) generates odd SQL to grant
privileges on sequence. Sequence is treated as a table, so SQL may look
like this:

GRANT SELECT, UPDATE, INSERT, DELETE, REFERENCES ON TABLE
"MySchema"."MySeq" TO "MyGroup";

what produces warning message:
WARNING: sequence "MySeq" only supports USAGE, SELECT, and UPDATE
privileges

Of course SELECT is granted :)

My suggestion is to change this behavior to produce SQL dedicated to
sequence:
GRANT SELECT ON SEQUENCE "MySchema"."MySeq" TO "MyGroup";

Without (INSERT, UPDATE, etc).
Also there is no USAGE option available in Grant Wizard window (schema node
only).

env pgAdmin 1.16.1 on Windows.

Regards,
Bartek