App sandboxed and notarized

• The application is sandboxed and notarized by Apple, there are no longer any issue with Gatekeeper except for the warning that the file has been downloaded from the Internet
• Bundled as DMG instead of ZIP to avoid Sparkle updates issues
• Add Sparkle entitlements
• Minor localization changes in Storage label
• Bump version to 4.4.6 (1646)
• About.This.Hack.4.4.6-glass.dmg is a version with translucent windows