Studio allows a normal method to be named Constructor, producing invalid source

The IDE's method editor currently allows a user to create a normal method and rename it to Constructor. This generates a method declaration equivalent to Sub Constructor(), but Constructor is an ObjoBasic keyword and cannot be used as a method identifier. The compiler then rejects the source.

Steps to reproduce:

1. Create or open a class.
2. Add a normal method.
3. Rename the method to "Constructor".
4. Try to compile/run.

Actual result:

The IDE accepts the name in the UI, but the generated source is invalid and compilation fails.

Expected result:

The IDE should prevent reserved keywords from being used as ordinary member names. For Constructor and Destructor, the IDE should direct the user to the dedicated "Add Constructor" / "Add Destructor" commands, or convert the member to the correct member kind.

Notes:

The engine supports real constructors using:

Constructor(...)
End Constructor