Currently, the Layout node class is used by the Reroute, Frame and
Compositing Switch node. To bring more uniformity, and clear up the use
of each class, this commit moves the Compositing Switch node from
the Layout class to the Converter class. This aligns it with similar
nodes (Compositing Split, Compositing Switch View, Geometry Switch)
which use the same class, and limits the Layout class to layout-related
nodes. On the UI side, this also gives the Compositing Switch node a
more relevant header color.
Pull Request: https://projects.blender.org/blender/blender/pulls/131392
a730d5f8ba