Add a funciton to duplicate a block and drag the duplicate (#1093)
Add a funciton to duplicate a block and drag the duplicate (#1093)


griffpatch/scratch-blocks,LLK/scratch-blocks,LLK/scratch-blocks,LLK/scratch-blocks,griffpatch/scratch-blocks,griffpatch/scratch-blocks,griffpatch/scratch-blocks,griffpatch/scratch-blocks,LLK/scratch-blocks,LLK/scratch-blocks