We need to improve enduser search experience in grids by increase control over filter menu.
In order to speed-up query providing we need to control which item is activated in Filter menu by default.
Very often default operator is set in grid configuration but enduser has to always change focus to second field  when he wants to provide search criteria. It becomes tedious activity when he search a lot.
Therefore we need access via api for controlling focus behavior in Filter menu.
It should allow to control this behavior without breaking existing tab sequence of controls.