Column Ordering: unexpected/invalid heading controls

[steve-haar]

From Amy Li,

Users can only tab to sort control and arrow keys to use the drag and drop. This is not expected behavior. Related to invalid controls in header issue VPAT-2938.

The new drag and drop feature will add to this existing issue VPAT-2938 of invalid heading controls (filters and resize column). Only sort is supported in ARIA specs. Because it is not valid ARIA to add controls in table or datagrid headings we recommend providing controls outside of the datagrid for keyboard and screen reader users, this can be accordion or dialog with datagrid editing options. Mouse users can still drag and drop or chose to use the alternative controls. The above issues for people who use screen readers or keyboard-only will be avoided with this implementation.