Ext.ux.grid.features.RowToolbar is a component for ExtJS 4 (tested on ExtJS 4.1.1a). Used to adding toolbar for each row in grid (Ext.grid.Panel).
Usage example in usage.js.
Demo also available by http://siterra.org/blog/2013/02/05/komponent-extjs4-dlya-integracii-strok-tablic-s-exttoolbartoolbar/