Incorrect handling of property "Class_decoration" for project option "C++ properties." The header migrates to the class decorator if no class decorator is specified.

[vlad-mal]

Hello!
In the "C++ Properties" project options, the "header" field becomes the class decorator if the "class decorator" field is left blank. If both fields are filled, then everything is fine.
Both fields are filled, everything is fine:

Only the "header" field is filled in, the value of the field has become a class decorator:

Regards, Malinovsky Vladimir.

[sodevel]

This happens for the same reason like #543, there is currently no fix available. As workaround, ensure that no fields of such composite properties are empty.