References: make type match ref_id and obj_id in list GUIs (47391)

[schmitz-ilias]

This PR fixes 47391 by making sure that ilObjectListGUI::$ref_id, ilObjectListGUI::$obj_id and ilObjectListGUI::$type of container references match. This seems a bit of a risky change, ilObjectListGUI::$type shows up a lot in ilObjectListGUI, see the ticket for details.

@kergomard, there are no code changes in your components, but this PR mainly concerns how an "interface" of your component should be used, so as far as I'm concerned this is your call to make. Let me know how you want to proceed with this and 47391, I can take of merging and whatnot.

@maalers, you should also have quick look here, ilObjStudyProgrammeReferenceListGUI is also affected. If you have any doubts or questions, let me know!

[kergomard]

Thank you very much for the PR @schmitz-ilias !

I would propose for you not to use this approach as this comes at a very high prize: References would not tell the truth about their type in lists. I'm completely sure that will bite you in the behind later on. I would suggest for you to override ilObjectListGui::insertSubscribeCommand() for all reference-types. This should, in my eyes, be provided by the component ContainerReference.

Best,
@kergomard