Update form.tpl
Update AdminBackupController.php

The strings can't be translated - fixed by removing breaklines in the translation strings.
Merge pull request #2182 from Caleydon/prestashop16-mychanges

[-] BO : Could not translate strings in form.tpl and backup controller
// follow up https://github.com/PrestaShop/PrestaShop/pull/2181, thanks @djbuch
// Follow up #2185, thanks @PhpMadman
[*] BO : Fix #PSCSX-3519, handle error for invalid date range
Merge branch '1.6' of github.com:PrestaShop/PrestaShop into 1.6
// follwup https://github.com/PrestaShop/PrestaShop/commit/8d5c585319db09de1a4eeeb7e2ad3d9ac58133b3
Merge branch '1.6' of ssh://github.com/PrestaShop/PrestaShop into 1.6
// check on order-opc
[*] BO : #PSCSX-1597, Remove useless filter
Merge branch '1.6' of github.com:PrestaShop/PrestaShop into 1.6