[1304] Wrong element dropped in an unsynchronized diagram

[mcharfadi]

Bug : #1304

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[AxelRICHARD]

• dropping instead of droping
• instead instead of unstead
• selected instead selectioned

[AxelRICHARD]

I will rebase the PR and will update the CHANGELOG

[AxelRICHARD]

Ready for a merge after the release of 2023.4.0