I just checked bootstrap dropdown in a cell renderer, it works fine and the action items are clickable.
postRender: function (ui) {
var rowIndx = ui.rowIndx,
grid = this,
$cell = grid.getCell(ui);
$cell.css('overflow',"visible");
$cell.find('.dropdown-toggle').dropdown();
$cell.find('.dropdown-menu li').click(function(evt){
alert(evt.target.innerText);
})
}
Please let me know if you need further assistance.