BUG: globalSum needed in the merit functions' directional derivative (fixes #1949)

Does not affect the current functionality of shape optimisation.

changed milestone to %v2012

added bug label

approved this merge request

added 5 commits

• 664bca1e...5d3f355d - 4 commits from branch master
• 7ffa36df - BUG: globalSum needed in the merit functions' directional derivative (fixes #1949 (closed))

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merged

mentioned in commit cfde0d67