Revert "When a datavector has been modified manually, save it as an editable vector."

This reverts commit a64e4a46d8d752399ead68778b1fc099777f1161.
Revert "When a datavector has been modified manually, save it as an editable vector."

This reverts commit a64e4a46d8d752399ead68778b1fc099777f1161.