Tabs: when select a tab, the resize event is dispatched always.

[ryupanqui]

When select a tab, the resize event is dispatched always, but should be dispatched when changes the width or height, not when are same. Is really necesary dispatch this event always?, because if a tab have layouts, datagrids, panels, graphs... and i select the tab, these are resized too. I am sure that if this is resolved, will have a high-performance.

please open the attached file named  'test.html', and click on "TAB 4", it shows alerts whenever the resize event of the tab and of the datagrid is called.