Add a scale factor that we apply to all drawing functions

[BastiaanOlij]

Our oBaseVisComponent should get a new property that we apply to all drawing functions called pScale.

This should enlarge how we render things but without our subclassed component needing to worry about this scale factor.

This would be handy for creating the ability for the user to zoom in on the component, to render to bitmap at a higher resolution, or potentially some day add retina support.