Fix script issues caused by the class wrapper

[MaciejG604]

Version(s)
v1.0.0 and newer

Describe what needs to be done and why

The class script wrapper that has been introduced in v1.0.0 (#2033) as a remedy to thread deadlocks, has proven to be quite problematic. E.g. #2128, #2157, #2241
The issues arise usually when the user-defined classes get passed as types.

A next-step would be to introduce a more complex script wrapping that allows for placing all user's class definitions outside of the wrapper class.

Solution until the above is fixed

A viable solution is to fallback to the old type of wrapper, this is done with
--object-wrapper command line option or with //>using objectWrapper directive.
With the object wrapper caution secondary threads should be avoided, though sometimes it's possible to work around this by using another level of encapsulation - see #532.