Shape Population Viewer on Linux will not display color pick dialog

[bpaniagua]

When using SPV on Linux as an integrated widget, the color pick dialog for the color bar will not show up when double clicking the circle within the colorbar.

cc: @jcfr

[bpaniagua]

Update, it does not work for MacOS either.
It does work for Slicer, not for SlicerSALT

[jcfr]

"Problem" has been identified, a fix is being implemented.
In a nutshell, in the standalone SPV, the GPL version of the Qt widget is used, in the one integrated, we rely on VTK chart and the "double click on point" event wasn't wired.

[jcfr]

After enabling the widget on top of the gradient, here is how it looks:

The next step is to make sure the change are propagated to the loaded models without having to click on "Reset range" button

[bpaniagua]

Is this ready for testing? If so what version?

[jcfr]

Change integrated in ShapePopulationViewer and ExtensionIndex updated