fix some indefined index
fix:  Assigning the return value of new by reference is deprecated
fix:  issue from last commit
fix: Undefined property: mod_codeclient_monkey::$prefixIsRequired
fix: Undefined index
Fix: [ bug #855 ] Holiday approval email in French
Fix: [ bug #855 ] Holiday approval email in French
Merge pull request #897 from grandoc/3.3

fix some indefined index
Removed duplicated entries and ordered fixes by bug ID
Fix: isset on scalar value
Merge pull request #902 from marcosgdf/3.3

Removed duplicated changelog entries and ordered fixes by bug ID
[ bug #865 ] Dolibarr navigation array in project/task do not work