d2f5edf64f
As soon as we ripple drag the selected region out of the original track, ::remove_unselected_from_views() is called and the rippled regions on the original track are not covered when ::remove_selected_from_views() is called again in ::finished(). Therefore we need to shift the regions remaining on the original track back and forth again, in order to have them properly in the undo history.
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