When fixing issues, seeing operation results can be helpful for
detecting which operation went wrong.
This patch adds an option for exporting all operations results to
image files.
Exceptions are:
- Output operations: They are already exported or can be seen in UI.
- Constant operations: There are too many and is rarely useful.
They are exported to "<temp session folder>/COM_operations/"
with filenames "<operation class name>_<operation id>.png".
Only works on full frame execution mode.
Operations ids can be seen on graphviz with this patch: D11720: Compositor: Graphviz improvements
Output example:
