Resizing ListGridHeader contextHeaderMenu

SmartClient Version: v9.0_2013-07-03/LGPL Development Only (built 2013-07-03)

I have removed all but
Sort Ascending
Sort Descending
Configure Sort...

from my ListGridHeader context menu. The Canvas does not resize instead extends to the height a full context menu would require.

Read the AutoChild docs and have tried a number of approaches but none has worked.

Any hints on how to resize the context menu canvas or get it to autosize.

tia.