[enhancement]Convert morph group to shapekeys

[NaughtDZ]

In fact, most 'morph groups' themselves are only composed of shapekeys that transform multiple vertices.
So, can we add a feature to convert "morph group" into a shapekey with just one click, that is, automate the process : setting a deformation to 1 in the "morph group" and then selecting " the merge deformation to a new shape key "on the grid shape key then rename it .While,this funciton can ignoring material or bone changes,so there may no have errors.