Fix serialization
Fix exception message
Merge pull request #650 from romainneutron/fix-1292

[3.8] Fix serialization
Fix basket browser display
Fix #1477 : let the upgrade crash if the upgrade procedure fails
Merge pull request #651 from romainneutron/fix-1476

[3.8] Fix 1476
Merge pull request #652 from romainneutron/fix-1477

[3.8] Fix 1477
Update locales
Merge branch '3.8'