Plot line disappears if any element is set too large

[williamjsdavis]

If any ordinate element in a plot array is either initially set (or modified to) a value that is too large, the plot line vanishes.

To reproduce the bug:

using Plots, SmoothLivePlot

function myPlotFun(yVals)
   plot(0:0.1:1, 0:0.1:1)
   plot!(range(0,1,length=length(yVals)), yVals)
   ylims!(0,2)
end

inyVals = collect(0.2:0.01:0.3)

outPltOb = @makeLivePlot myPlotFun(inyVals)

Modifying an ordinate element of the plot object to modest values produces no error:

newYvals = copy(inyVals)
newYvals[5] = 10

modifyPlotObject!(outPltOb, arg1 = newYvals)

However, modifying to large values makes the line disappear

newYvals[5] = 1e8

modifyPlotObject!(outPltOb, arg1 = newYvals)

"Large" ordinate values that cause the bug seem to be >1e8. Interestingly, this bug does not occur for large negative numbers. This bug does not occur with scatter. Large abscissa have not been tested yet.