add_widget does not honor max_cols

[xmikew]

http://jsfiddle.net/mKKXz/2/

create grid with max_col 1.
Click 'add widget' a couple of times. Notice that the widgets will be added in columns that exceed max_cols. You won't be able to swap a widgets if they are in a col < max_col with one that >= max_col but you can move the widgets that are in the invalid cols to the ones that are in the col.

See jsfiddle for examples.

[xmikew]

Not extremely familiar with the code, and not setup to run unit tests but here's a potential fix.

https://github.com/xmikew/gridster.js/commit/372db2b11a6fd4a26e61b0115b64d3efda426970

In my limited use case, seems to work alright.

- Mike

[mobweb]

@xmikew: Your fix is giving a 404, any chance you could share it? Because I have exactly the same problem.