Color palette weirdnesses

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

We are seeing color palette weirdness's. This needs to be fixed.

<<Bug 1>>

Color Palette icon. Change to gradient background.
Edit current palette.
Change background color to white. OK, OK. All is fine.
Color Palette icon. Change to black background.
Color Palette icon. Change to gradient background. The white color was not remembered. This is a bug.
Exit ParaView, restart ParaView.
The gradient background now looks as it should, dark blue top, white bottom.

Once again, delete your config files.

<<Bug 2>>

Properties tab, change Background to Gradient.
On the Color palette icon, change to white background. We are still in Gradient mode. This is a bug. Bottom color correctly changes to white, top color stays dark blue. This is a bug.

Edited Jan 27, 2021 by Vicente Bolea

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