New FamilyTreeView Addon

[emyoulation]

@ztlxltl

@Woody

Can you please change the color of the boxes. There seem to be display issues when using the dark theme.

I completely forgot to test with other themes. Since I’m not used to this topic at all, this will take some time to get fixed (by me)

The first step in dark Theme support is to try semi-transparency via alpha channels (RGBa) for your colors.

A semi-transparent color will darken the background in Light modes and lighten the background when in Dark modes.