Make Graph "Loose Fit" option actually work

[TurboPhil]

Can we get a "Loose Fit" plot axis option that actually works?

In the plot above, it's really hard to tell without squinting what the value was over time. Did it transition from 5 to 6, or 6 to 5? If you toggle the "loose fit" option in this plot, it looks exactly the same.

Can we add a property to specify something like "LooseFit.Padding"? Users could enter a percentage of full scale value, so then once the native autoscale algorithm is performed, it bumps out the y-axis min/max values by x% of the full range.

[altenbach]

In addition, we don't want the first and last tick marks at the axis edge, but at resonably indented values.

That's where this idea will come in handy! Both ideas should be implemented simultaneously. 😄