Grid and listbox can already have a menupopup on each column header.
The aim of the new feature is to have the possibility to configure a data filter in this menupopup.
My customers want to have a filter system like GWT example : http://www.sencha.com/examples/#ExamplePlace:filtergrid
In this example, the filter menu contains textboxes for columns compagny and last, and calendars for column last update.

This is an urgent need for my clients.
It is possible to implement it ?