Blender Git Loki

Fix T51863: CompositorNodeSwitchView have the wrong rna API

Although the original report was about the docs, the real issue was in
the API.

My original commit started from a copy-paste from the Switch
Node. However I don't use custom1 for thew Switch View node.

The docs is slightly incomplete since it would be nice to mention the
views here. Or maybe even expose them via Python. But honestly they are
generated depending on the scene multi-view settings.