Add an asset shelf to the compositor node editor.
This is part of simplifying the compositing workflow:
https://projects.blender.org/blender/blender/issues/134214.
The reasoning is:
- Assets will help users get started more easily with compositing
- Assets will help keeping users within Blender and use the compositor
instead of doing post processing in a different software.
- The asset shelf is better than the asset browser because it has a
better user interface; it's easily hidable and doesn't take much space
The asset shelf is hidden by default in this PR, since we have no
assets yet.
Previously, a similar implementation was proposed for all node editors,
see https://projects.blender.org/blender/blender/pulls/110589.
We didn't move forward with this PR for the following reasons:
- For geometry nodes, no concrete use case was known/proposed
- The PR didn't intend to actually show the asset shelf, only
implement the possibility that it can be shown in node editors
Known Issues:
- Can't hide the asset shelf if region overlap is off: #129737
Pull Request: https://projects.blender.org/blender/blender/pulls/138983
0a0dd4ca37