update fitToScreen function to center graph
update fitToScreen function to center graph

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