MadGraphControl protecting parameter popping

The current implementation seems to be finicky some fraction of the time. This attempts something a bit more rigorous to be sure that the settings all work.

@hmildner had spotted an issue with this in the wild, so feel free to comment in case you think there are some other changes that should be applied to protect against this.

This merge request affects 1 package:

• Generators/MadGraphControl

This merge request affects 1 file:

• Generators/MadGraphControl/python/MadGraphUtils.py

Adding @zmarshal as watcher

added Generators main review-pending-level-1 labels

WARNING: big files (>100K) are found in the changeset

120K in file Generators/MadGraphControl/python/MadGraphUtils.py

CI Result SUCCESS (hash 777bf709)

	Athena	AthGeneration
externals
cmake
make
tests

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AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-EL9 5382] (remote access info)

removed review-pending-level-1 label

added review-approved label

merged

mentioned in commit 8721c9f8