optionally show icons instead of names for toolbox categories
optionally show icons instead of names for toolbox categories

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