Add a print method

[guest]

It would be very nice to have a print method for the grid widget. Imagine the following situation: You have two or even more grids on one page and you would like to print just one of them on click so that it fits the whole paper. Of course you can solve this differently, but I think something like myGridObject.print(); would be wonderful! At least it may be nice for all of the widgets. But I just need it for the grid.