[0.85] several fixes : right management for search_config + footer tag position on notification


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@21190 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.85] Exclude some images / signature when importing a mail see #2807
Image part


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@21191 35612d4c-9d10-0410-837c-bf9dd1be60d7