[-] Fix bug #PSCSX-3270 fatal erro when not using mysql driver
[-] Fix bug #PNM-267, Call to undefined method AdminSelfUpgrade::addCSS()
// follow up https://github.com/PrestaShop/PrestaShop/commit/03ec33a0bcb48f8440c99021d5104add109f322f
// typo
// ajax timeout x 3
//Version update