Merge pull request #1192 from djfm/1.6

// Improved retrieval of translations when installing module
// Norm
[-] MO : be sure to use sales price in stats
// Factorized a bit of code
[-] BO: Clear CCC cache after media servers update
Merge branch '1.6' of https://github.com/PrestaShop/PrestaShop into 1.6
[-] FO : FixBug #PSCSX-102 - email input too small
[*] MO : fixed module installs according to the availability of left and right columns
[*] Core: allow to call hooks with a different shop - usefull in the BO - #PSCFV-10530
// adjust colors for installed // inactive modules
// two columns for notifications in dashactivity
// Fixed module installation during... installation
[+] BO : Added bulk change order status
// fix shop selector - PSCSX-162
// fix file_exists cache on PDF bulk generation
// fix fatal error & update default theme xml configuration
// small perf fix

Conflicts:
	classes/Language.php
Merge branch '1.6' of https://github.com/PrestaShop/PrestaShop into 1.6
[-] PDF : fixed TCPDF issue: sometimes the disk cache for images is deleted but the image is still present in $imagekeys, thus TCPDF looks all over the web for an inexisting image
[-] FO : Fix bug #PSCFV-11098 logo under media servers