Update cukes for wp columns dialog (with select2)

Unmark two scenarios as wip, making them toolbar/modal dialog-aware.
Initially update step definitions for adding columns with select2.

This partially reverts 97c9b9cac631c6995d098dd7ba8062d21b0c5562

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Update further cuke feature for toolbar

Unmark total sums scenario as wip, making toolbar-aware.

This partially reverts 97c9b9cac631c6995d098dd7ba8062d21b0c5562

Signed-off-by: Alex Coles <alex@alexbcoles.com>