Switch relevant dropdowns to dropups
Cleanup barchart tooltip

Adds commented out y-axis legend
Fixes missing margin.left adjustments not caught since
default left margin is 0.
Update scatterchart stroke/opacity/radius

Radius 2,6 -> 3,10
Opacity 0.9 -> 0.6
Stroke -> None
Merge pull request #119 from CloudNiner/feature/charts-cleanup

Feature/charts cleanup