NB: It is important to mention that all my source code changes have been done in the "SelectionServerInit.cpp" (*) file.
I have made trial&error modifications in the region below:
but alas, I am getting one menu (as expected) but only one menu item (I want two). See solution in the post below.
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(*) I wish there were a law ruling that all those operations were done in a file with the plugin name plus "Init" appended to it. Not even mighty Adobe is consistent following this logical practice.