Hi devs,

I have an issue with the QGIS Raster Color Ramp UI, I can't get the color ramp item list set with PyQGIS.

I have a PyQGIS Script to set the Raster Color Ramp like it is defined in the pyQGIS cookbook. It works find for rendering and legend, but if I open the Raster layer properties and look at the Style tab, the color ramp list item is not exactly the same as the one I defined in  my script. Values and labels are saved, but the color is lost.

How to fixed the color ramp item list ?

The pyQGIS cookbook code [0] works for rendering but the UI loose the list.
If you try this code, you ill not get 2 items in the UI
```
fcn = QgsColorRampShader()
fcn.setColorRampType(QgsColorRampShader.Interpolated)
lst = [ QgsColorRampShader.ColorRampItem(0, QColor(0,255,0)),
      QgsColorRampShader.ColorRampItem(255, QColor(255,255,0)) ]
fcn.setColorRampItemList(lst)
shader = QgsRasterShader()
shader.setRasterShaderFunction(fcn)
renderer = QgsSingleBandPseudoColorRenderer(rlayer.dataProvider(), 1, shader)
rlayer.setRenderer(renderer)
rlayer.triggerRepaint()
```

Regards,
René-Luc
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