Problem with Vaadin 7.6.1 new Grid features

Vaadin 6 / 7 / 8
1

I have updated to Vaadin 7.6.1 but I cannot get the Grid column resize, sorting icons to work.

How do I get the column resize to work
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2

Have you recompiled the widgetset after you updated the Vaadin version?

3

Yes, I have compiled widgetset and theme, several times, cleared catche and did again.

But no luck