fixes node border issue on canvas zoom
fixes node border issue on canvas zoom

caskdata/cdap,chtyim/cdap,caskdata/cdap,chtyim/cdap,chtyim/cdap,chtyim/cdap,chtyim/cdap,caskdata/cdap,caskdata/cdap,chtyim/cdap,caskdata/cdap,caskdata/cdap