f4b9ca758a
This allows setting a color tag for node groups which affects the header color of group nodes. With this, node groups can look even more similar to built-in nodes. The only remaining difference is the node group icon in the node header. Blender has quite a few different built-in color tags. Most of those are exposed with very few exceptions. For example, the layout, interface and pattern categories are not exposed because they are only for built-in nodes or are not used anymore. It's generally agreed upon that the set of different color tags is likely too large. Some differences between color make more sense in some contexts than in others. In the interest of consistency, it was decided to expose all these categories anyway. If we ever decide to consolidate them, the worst that can happen is that a group looses it's category, which wouldn't be too bad. Pull Request: https://projects.blender.org/blender/blender/pulls/121385
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