Allow redeclareing a protected property as public.

Allow redeclareing a protected property as public.
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# The only known thing left at this moment is that the protected static members
# of a base class is different then the redeclared public property. I tried
# to remove both new and old static properties in the derived class and copy
# the base property with the new name. But for reasons i have to check later
# that didn't result in the expected behavior. Anyway we would need a warning
# if someone tries to change the value of a static property in a derived class.
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