[Enhancement] do not draw data if the data is going to be highlighted

Found an issue today while adding transparency to highlight color, which is white color + 0.5 alpha.

Then I found that it's not pure white, with a little blue, which is the data set color, because we perform `drawData` before `drawHighlighted`, so every data is redrawed and being highlighted above. This seems can be improved, if we found some data is going to be highlighted, we can avoid draw it.