Set new connectionLineCurveName, if the current active curve was removed

Description

Set new connectionLineCurveName, if the current active curve was removed, otherwise the wrong name is set, but the curve is anymore available This leads to a wrong position of the infoelement

Conformity

• Changelog entry
• Downport
• Unittests
• Fixed Bugs: #666

If external dependencies are removed

• Reporting to ...