Errors in the filter documentation

[gloomytree]

The grids at http://backgridjs.com/ref/extensions/filter.html do not render because of js errors.

Console.log():

filter.html:299 Uncaught TypeError: Cannot read property 'extend' of undefined
at filter.html:299
(anonymous) @ filter.html:299
(unknown) Uncaught TypeError: Cannot read property 'fullCollection' of undefined
at child.initialize (eval at (bundle.js:321), :261:58)
at child.Backbone.View (eval at (bundle.js:330), :1192:21)
at child [as constructor] (eval at (bundle.js:330), :1852:41)
at new child (eval at (bundle.js:330), :1852:41)
at eval (eval at (eval at (bundle.js:60)), :4:34)
at eval ()
at HTMLTextAreaElement.eval (eval at (bundle.js:60), :51:26)
at Function.each (eval at (bundle.js:87), :365:19)
at jQuery.fn.init.each (eval at (bundle.js:87), :137:17)
at setUpCodeMirror (eval at (bundle.js:60), :35:30)