Move square dropdown border under text (#657)
Move square dropdown border under text (#657)

* add dropdown border under text

* add class 'blocklyBlockBackground' to rect

* empty commit

* undo fb7f1c8

sclements/scratch-blocks,LLK/scratch-blocks,sclements/scratch-blocks,griffpatch/scratch-blocks,gengshenghong/scratch-blocks,griffpatch/scratch-blocks,griffpatch/scratch-blocks,griffpatch/scratch-blocks,sclements/scratch-blocks,gengshenghong/scratch-blocks,gengshenghong/scratch-blocks,gengshenghong/scratch-blocks,LLK/scratch-blocks,LLK/scratch-blocks,sclements/scratch-blocks,gengshenghong/scratch-blocks,sclements/scratch-blocks,LLK/scratch-blocks,griffpatch/scratch-blocks,LLK/scratch-blocks