Keep selected state after duplicateShapes

[txh0001]

when i use duplicateShapes feature ,all shapes will lost select state after i copy them. so i can not move them to a new position. it seems that when i comment the follow code ,it is worked as i want:

def duplicateSelectedShape(self):
    added_shapes = self.canvas.duplicateSelectedShapes()
    # self.labelList.clearSelection()   #comment this
    for shape in added_shapes:
  ..........

so could keep this change on next version?

[wkentaro]

Makes sense. Merged to main via this PR: #1401