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Unchecking Before & After date checkboxes doesn't update results properly
On the Last Updated column on the grid in http://www.sencha.com/examples/#ExamplePlace:filtergrid, the following is the scenario:
1) Set the After filter
2) Set the Before filter
3) Uncheck the Before or After or both filters
Problem: the result set doesn't get updated until the Filters checkbox is unchecked explicitly