Allowing xtol and ftol stopping criteria in OptimisationController#1508

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MichaelClerx wants to merge 2 commits intomainfrom

Commits on Nov 21, 2023

Added OptimisationController.set_unmoved_iterations and slightly refactored its run method.
MichaelClerx
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Updated (and corrected) changelog.
MichaelClerx
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