Fixing bug #5443 by managing correctly existing form content in several languages :
- when parent object is copied or moved (data on file server and database were incorrect)
- when parent object was removed (only data in database were incorrect - not removed).
Renaming some parameters to be less ambiguous
fixing bug #5340 by preventing exception to not block statistics
ney bug #5443 :   Merge branch 'ney-bug-5443' of https://github.com/NicolasEYSSERIC/Silverpeas-Core into core-5.13.x