Forgot the data-changed CSS class in new material theme
Forgot the data-changed CSS class in new material theme

Fix for AG-741

seanlandsman/ag-grid,killyosaur/ag-grid,ceolter/angular-grid,seanlandsman/ag-grid,ceolter/ag-grid,ceolter/angular-grid,killyosaur/ag-grid,ceolter/ag-grid,seanlandsman/ag-grid,killyosaur/ag-grid