ENYO-1883: Moved ok and cancel buttons at the bootom of the popup
ENYO-2134: back before Enyo-1020 on kind "ProviderList", header: "Sources" instead of header:"Toto".
Revert "ENYO-1883: Moved ok and cancel buttons at the bootom of the popup"

This reverts commit 3a72c3b0f41ca9122b5a3ea7ae1fad3355d25002.
Merge pull request #250 from enyojs/ENYO-2134

 ENYO-2134: back before Enyo-1020 on kind "ProviderList"