[0.85] manage multi entity for dropdown


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20558 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.85] add item tab in location form - see #2280

git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20559 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.85] hierarchical dropdowns


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20560 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.85] clean code


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20561 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.85] improve display


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20562 35612d4c-9d10-0410-837c-bf9dd1be60d7