Bug: DatePicker in RelativeDateItem does not work with lates nightly 3.1p

Hello,

I use the latest nightly 3.1p (LGPL 2013/01/24).

If you use a RelativeDateItem and clear the Text-Field, the DatePicker no longer works.

Code:

        DynamicForm form = new DynamicForm();
        form.setFields(new RelativeDateItem());
        form.draw();

Stack-Trace:

Code:

string is null Stack from error.stack:
unnamed(._splitDateStrin) @ ui/sc/client/language/Date.js:828
unnamed(.isDatetimeStrin) @ ui/sc/client/language/Date.js:687
unnamed(.parseDat) @ ui/sc/client/widgets/form/RelativeDateItem.js:1419
unnamed(.getStartDat) @ ui/sc/client/widgets/form/RelativeDateItem.js:1371
unnamed(.showPicke) @ ui/sc/client/widgets/form/RelativeDateItem.js:1278
unnamed(._createEditor/items[2].icons<.clic) @ ui/sc/client/widgets/form/RelativeDateItem.js:773
unnamed(._iconClic) @ ui/sc/client/widgets/form/FormItem.js:10522
unnamed(.handleClic) @ ui/sc/client/widgets/form/DynamicForm.js:7316
unnamed(.invokeSupe) @ ui/sc/client/language/Class.js:1369
unnamed(.Supe) @ ui/sc/client/language/Class.js:1213
unnamed(._createCanvas/canvasProps.handleClic) @ ui/sc/client/widgets/form/CanvasItem.js:315
unnamed(.bubbleEven) @ ui/sc/client/event/EventHandler.js:4559
unnamed(.handleClic) @ ui/sc/client/event/EventHandler.js:2531
unnamed(._handleMouseU) @ ui/sc/client/event/EventHandler.js:2319
unnamed(.handleMouseU) @ ui/sc/client/event/EventHandler.js:2214
unnamed(.dispatc) @ ui/sc/client/event/EventHandler.js:5273
unnamed(anonymou) @ ui/sc/client/language/Object.js:119
unnamed() @

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