[4.2] Move the logic to get the menu item language on login to the model

[laoneo]

Summary of Changes

The logic to get the language for the return menu item should be in the model as there is the database available.

Testing Instructions

• Create an articles list menu item
• Create a login menu item with a redirect to the articles list menu item
  
• In the file /libraries/src/Language/Multilanguage.php replace line 44 with {return true;
• On the front end log in with this new menu item

Actual result BEFORE applying this Pull Request

You should get redirected to the articles list menu item.

Expected result AFTER applying this Pull Request

You should get redirected to the articles list menu item.

[SumCompanyInc]

I have tested this item ✅ successfully on bf8dd2c

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[roland-d]

Thanks everybody