[-] PDF : Fixed unecessary slash in overriden template path
[-] PDF : Fixed unecessary slash in manufacturer image path test

In the file_exists test of the manufacturer image path there is an unecessary slash after the constant _PS_MANU_IMG_DIR_, and then we can't display a specific manufacturer image.
[-] BO: fixed lots of UI bugs in CMS:
- no more id_category (doesn't exists, it's id_cms_category)
- change category position now redirects in parent category (not at root category)
- change category status now redirects in parent category (not at root category)
- delete multiples category now redirects in parent category (not at root category)
- add form new category now auto select parent category (not root category)
- add a new category now redirects in parent category (not at root category)
- delete multiple categories now redirects in parent category (not at root category)
- now execute parent::postProcess() only if none action found (duplicate postProcess was done)
- now redirects to CMS form if found errors (not at root category)
- fixed unexists $object variable (was $cms) for saveAndStay
- delete multiple cms content now redirects in parent category (not at root category)
- change cms content position now redirects in parent category (not at root category)
- change cms content status now redirects in parent category (not at root category)
Merge branch 'development' of https://github.com/PrestaShop/PrestaShop into development
// Fixed link
// Order confirmation meta data installation fixed
// IT order confirmation meta
// Changed modules list button (Sarah needed here!)
// CSS fix
// With the image
[-] BO: pagination was missing on tax rules listing
[*] WS: the customer services are now handled by webservices
[-] BO: Fix form displayed for features add after error
// license
[-] Core: Mobile_Detect library upgrade to 2.5.5
[-] BO: Fix #PSCFV-7995 countries/groups/currencies refreshment when selecting a shop in specific price form
[-] MO: Fix max lenght allowed for 3 field on homeslider configuration #PSCFV-7897
[-] BO: Filter customers listing by shop context on AdminGroups
[-] BO: Fix module listing with addons module with default currency not on the xml #PSCFV-8005
// withdraw empty lines, convert line feeds to \r\n