Test results graph toggling are connected per color.

[MaartenHilferink]

These results of "t641 3 RSOpen Allocate" show that there is no performance degradation; lower purple line = 19.4.0 with fftw3 whereas the red lines represent the memory usage of 19.3.0 with Intel's IPP.

Note that currently graphs are only toggleable per color, causing the crash graph of 18.1.3 to be present here when 19.4.0 is shown.

Originally posted by @MaartenHilferink in #463

[MaartenHilferink]

Furthermore, if the last semantic version number is A.B.C. I'd only like to see earlier patches X of A.B.X, The last patches of earlier minor versions of A, and the last patches of the last minor versions of earlier major versions. Other versions don't need to be included in the results for A.B.C.