Textautocomplete search field doesn't have AJAX PROCESSING when in a grid

Hi,
i have a textautocomplete search field on a grid, i need to reload another search field when it changes but i don’t have the AJAX PROCESSING option , if i change the field type to Select the AJAX PROCESSING option is showed .
Now, is there the possibility to add AJAX PROCESSING option on Autocomplete text field too? Maybe in next releases?
Thanks